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<b>ƠN TẬP TRONG THỜI GIAN NGHỈ PHỊNG DỊCH LỚP 11 SỐ 2 </b>
<b>Phần 1</b>

<b>Choose the word which has the underlined part pronounced differently:</b>
1. a. facsimile b. transfer c. spacious d. fax
2. a. ready b. friend c. telephone d. speedy
3. a. subscribe b. facsimile c. pride d. provide
4. a. spacious b. courteous c. document d. technology
5. a. commune b. security c. punctuality d. Distribute
<b>Choose the word that has the main stress placed differently .</b>

1. a. technology b. competitive c. facsimile d. document
2. a. courteous b. subscribe c. service d. customer

3. a. transit b. transmit c. transact d. translate
4. a. capacity b. communal c. secure d. imagine
5. a. installation b. disadvantage c. dissatisfied d. disappointed
<b>Choose the best answer for each sentence:</b>

5. This hotel has got a very---kitchen.
A. spacious B. space C. spaceship D. spacing

6. I want to have this sum of money sent to Sydney by……Money Transfer Service
A. Press B. Express C. Speedy D. Quickly

7. September 2nd_{1945 was the date---President Ho Chi Minh declared}
the Independence of Vietnam.

A. where B. who C. when D. which

8. I am going to visit the town---I was born and grew up.

A. where B. which C. when D. who

9. Their house,--- was destroyed in the storm, is now being rebuilt.
A. whom B. whose C. which D. that
10. The police are asking the man---car has been stolen.
A. whom B. whose C. which D. that
11. The man---she respects is her teacher.

A. whom B. whose C. which D. who
12. A ________ is a person who believes that all wars are wrong.

A. pacify B. pacific C. pacifist D. pacifism
13. A __________ is a person who buys something from a shop.

A. customer B. burglar C. shoplifter D. coward
14. What is the Messenger Call Service used _________?

A. in B. to C. for D. from

15. - A: ____________ ? - B: It’s five thousand dong.

A. How long is it B. How much is it C. How far is it D. How high is it
16. My uncle, _____ you met yesterday, is a lawyer.

A. that B. whose C. whom D. which

17. The boy ______ eyes are brown is my friend.

A. who B. whom C. which D. whose

18. Ben Tre, _________ is in the South of Vietnam, has a lot of coconuts.

A. which B. where C. whom D. whose

19. The opposite of “courteous” is “ _____________’.

A. politeB. large C. rude D. helpful

20. Most schools and universities are now equipped _________ surveillance cameras and
other security measures.

a- on b- for c- in d- with

21. The firm, ____ employs five hundred people, makes video recorders.
a. that b. which c. who d. whom
22. I’m working on a firm ______ main office is in London.

a. that b. whose c. whom d. why
23. The man _____ I saw last week said something totally different.

a. that b. whom c. where d. a & b

24.I work mainly in the Finance Department,___ is the smallest department in the firm. a.
that b. which c. where d. all are correct

25. A(n) _____ is someone who designs buildings.

a. customer b. shoplifter c. tenant d. architect
26. A ___ is someone who is not brave.

a. shoplifter b. tenant c. coward d. architect
27.Thanh Ba Post Office is equipped _____ advanced technology.

a. in b. with c. for d. on
28. The hotel staff are always friendly and courteous.

a. perfect b. helpful c. polite d. efficient
29. This speedy and secure service of transferring money can be useful.

a. rapid b. hurried c. careful d. slow
30. We offer a very _____ rate for parcels under 15 kg.

a. competing b. compete c. competitive d. competition
31. Can you let me the ___ of your report? I can’t read this photocopy.

a. origin b. original c. originally d. originate

32.The Messenger Call Service helps you to notify the recipient<b> of the time and place to </b>
receive the call.

a. receiver b. fax c. call d. telephone
33. Fax ___ has become more and more popular because it is cheap & convenient

a. exchange b. distance c. sending d. transmission
19. My parents _____send their best wishes..

a. that you met last month b. who you met last month
c. whom you met last month d. All are correct

34.Do you know the boy____ borrowed that book?

a. who b. that c. a & b d. whom

35. The chemical_____from cars and factories make the air,water & soil dangerously dirty.
a. pollution b. pollutants c. pollutant d. pollute

36. The blue whale is a(n) _____ species.

a. dangerous b. danger c. endanger d. endangered
37.Many organizations have been set up.

a. decreased b. delayed c. collapsed d. established
38. Laws have been introduced to prohibit the killing of endangered animals.

a. ban b. allow c. advise d. conserve

39. If people’s interference ______ the environment decreases, more species will survive
and produce offspring.

a. on b. to c. with d. for
40. Human beings are changing the environment ____ all respects.

a. in b. about c. from d. to
41.The house ______ I was born has been sold.

a. that b. which c. in which d. whom
42. The man _____ you talked yesterday is my uncle.

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a. where my sister is living b. in which my sister is living
c. which my sister is living in d. All are correct

44. I’d like to see the trees ______ you’ve picked these apples.

a. from those trees b. from which c. which d. from that
45.Forest destruction results ______ floods and air pollution.

a. from b. about c. in d. into
46. Water is one of the most precious resources ______ for our life.

a. we depend on which b. which we depend
c. on which we depend d. on that we depend

48. The World Wild Funds is working to protect and save the forests that are in…...
a. interest b. danger c. encouragement d. consequence
49. Air pollution interferes _____ our body’s ability to process oxygen.

a. with b. on c. to d. over
51. The Earth is one of the ____ in the solar system.

a. results b. environments c. planets d. resources
52. People in this region cultivate mainly rice and vegetables.

a. destroy b. grow c. develop d. support
53. My English teacher, Mrs Brookes, was someone _____ I had great respect.

a. that b. whom c. for who d. for whom
<b>I. Choose the best answer</b>

1) Many rare _______ of animals are in danger of extinction.

A. species B. classes C. beings D. pairs
2) People are destroying the environment by adding ____ to it.

A. pollutes B. pollutions C. pollutives D. pollutants
3) Many efforts have been made to protect ____ nature.

A. danger B. dangerous C. endanger D. endangered
4) Many species of animals are threatened and could easily become ____.

A. disappeared B. vanished C. empty D. extinct
5) Many animals are ____ for their fur and other valuable parts of their bodies.

A. hunted B. chased C. run after D. followed
6) They started a campaign to ____ smoking among teenagers.

A. encourage B. decrease C. discourage D. prohibit
7) Dinosaurs became ____ millions of years go.

A. disappear B. extinct C. lost D. endangered

8) The chemical ____ from cars and factories make the air, water and soil dangerously dirty.
A. pollution B. polluted C. pollutants D. pollute

9) Human beings are ____ for the changes in the environment.
A. account B. faultyC. blame D. responsible
10) By cutting down trees, we ____ the natural habitat of birds and animals.

A. hurt B. would C. damage D. injure

11) ____ aren’t effective anymore because insects have become resistant to them.

A. Fertilizer B. Pesticides C. Herbicides D. Composts
12) They started a campaign to ____ smoking among teenagers.

A. encourage B. decrease C. discourage D. prohibit
<b>II. Complete each sentence, using relative pronouns:</b>

1. Mrs. Brown,……….is 45, as four children.

2. This is the boy ………studied with me in high school.
3. Mary said something ……….I couldn’t hear clearly.
4. Sydney,……….I live, is a very beautiful place.

5. I don’t know the name of the woman………I met yesterday at the station

6. Mary,………sits next year to me, is good at math.
7. That’s the man …………..Nelly gave the money to.
8. Is this the ring…………..you were looking for?
9. An orphan is a child ………….parents are dead.

10. Colin told me about his new job,………….he’s enjoying very much.
11. This morning I met somebody………I hadn’t seen for ages.
12. My office,………….is on the second floor of the building ,is very small.
13. The people………….we met at the party were very friendly.

14. Amy,………….car had broken down, was in a very bad mood.
15. The man…………..repaired my car is a real expert.

16. The detective lost sight of the man ………he was following.
17. The car …………..won the race looked very futuristic.

18. Is this article,………you were interested in.
19. That’s Jack, ………lives next door.

20. I thought I recognized the assistant………..served us.
<b>III. Join the sentence, using relative pronouns:</b>

1. I met Tom’s mother. She works at the university.

I met……….
2. The movie is very interesting. We are talking about it.

The movie………..
3. I saw several houses. They were quite unsuitable.

I saw ……….
4. Her many friends gave her encouragement. I like to be considered among them.
Her many friends………
5. We are moving to Manchester. Manchester is in the north-west.

We………..
<b>IV. Combine the following sentences using relative pronouns.</b>

1. The story was very boring. We listened to it last night.

………
2. The films is so thrilling. Everyone is talking about them.

………
3. The man taught us English. We’re telling you about him.

………
4. The pretty girl is Sally. I introduced you to her.

………
5. The bookstore is closed. I bought the books from it.

………
Rewrite the following sentences:

1. My friend gave me a lot of advice. I think of them every night.

………
2. The girl is John’s sister. I introduced you to her.

………
3. Who was the first person who left the office yesterday?

………

4. People have gathered in front of the Town Hall which are protesting against pollution.
………

5. A tenant is someone who rent a room, a house or an apartment.

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………
7. Mr. John hasn’t given us his reply. We sent to him the letter.

………
8. The man was found dead. We’re looking for him.

………
9. Jenny who plays piano very well is a nice friend.

………
10. This is the last one who was rescued by the police.

………
<b>Choose the best answer.</b>

1. I’m working on a firm……….main office is in London.
a. which b. that c. whosed. a & b are correct

2. The company……….employs five hundred people makes video recorders.

a. who b. that c. whom d. whose

3. My boss,……… work takes him to a lot of different countries, has decided he needs an
assistant in London.

a. who b. whomc. which d. whose

4. Stop him. He’s the man………stole my wallet.

a. who b. whomc. which d. whose

5. The man……….I saw last week said something totally differently.
a. which b. whom c. that d. b & c are correct
6. The students………for the train are good ones.

a. waited b. waiting c. which is waiting d. to wait

7. This is the seventh person………late.

a. coming b. to come c. come d. all are correct
8. They have invented a television set………as small as a watch.

a. which is b. is c. who is d. whose

9. The work………….increases a lot when the boss is away is always interesting.
a. which b. whose c. that d. a & c are correct
10. The book………..by Jack, is very famous.

a. which written b. written c. was written d. writing
11. There is only one boy……….in this game.

a. who participating b. participated c. participating d. who can
participate

12. I was introduced to a man………brother is my teacher.

a. which b. whose c. that d. whom

1. My bother Chan is someone………..about sports.
A. to whom I always enjoy talking B. I always enjoy talking to him
C. with who I always enjoy talking D. whom I always enjoy talking to him.
2. This is the book. He’s almost proud of it.

A. This is the book which he’s almost proud of.
B. This is the book which he’s almost proud.

C. This is the book of which he’s almost proud.

D. A & C are correct.

3. She gave us lots of suggestions……….we must think.

A. about that B. about which C. that D. which

4. The historical facts………….this document bases are very worth considering.
A. about which B. for which C. at which D. on which
5. He is the actor about …………. I often tell you.

A. that B. who C. whom D. him

6. The song …………. I listened last weekend was boring.

A. to that B. to which C. for what D. for which

7. That’s the girl to …………. my brother got engaged.

A. which B. who C. whom D. her

8. I don’t know the reason …………. she hasn’t talked to me recently.

A. on which B. for which C. of which D. about which
9. The little girl …………. I borrowed this pen has gone.

A. whose B. from who C. from that D. from whom

10. The speech …………. we listened last night was information.

A. to which B. which to C. to that D. that

11. The boy to …………. I lent my money is poor.

A. that B. who C. whom D. B and C are correct

12. The knife …………. we cut bread is very sharp.

A. with that B. which C. with which D. that

13. It is right that politicians should make important decisions without consulting

A B C
the public to who they are accountable?

D

14. The song to that we listened last night was beautiful.
A B C D

<b>TENSES</b>

1. At this time yesterday, we (study) _____________English at TVQ high school.
2. Water (boil)______________at 100o_C.

3. When we (enter)___________his room last night,he &his friends (sing)…………
4. Last night, my mother and I (go) ____________out to walk after we (have)
_______________________our dinner.

5. We (do)____________a lot of exercises on tenses since the school year started
6. Look! It _______________(snow) outside.

7. Mary and John are neighbors. They (know) ___________________each other for
several years. Mary (move)____________into her house in 1985, and John (live)
____________next door since he (come) ____________to the area in 1990.

8. Stella (watch) ________________TV now. She always (watch) ___________a show at this
time.

9 ____________ (she post) ________________________ the letters last night?
10. By the time we arrived, everyone (leave) _____________________ the building.
11 Mr Johnson (live) _____________in Washington, but he (stay) ___________
in London at the moment.

12. A. What _____(you /do)_____ at 9.00 last night?B. At 9.00 last night? I (watch)
____________ TV.

13. John (lose)_______his job last month & since then he (be)_________out of work
14. When Alice (get) ……… there, …………..(you/show) …………her to her room?
15. The musicians whom we (listen)……….………to yesterday (play) ………..
……… together for many years.

II. Viết lại câu sau theo hướng dẫn :

1. The man who is standing there is a clown. (Rút gọn)

………..
2. The diagrams which were made by young Faraday were sent to Davy in 1982.
………
3. My brother, who met you yesterday, works for a big firm.

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4. Who was the first Vietnamese woman that set foot on the Antarctic

………..
5. The teacher is Mr. Mike. We studied with him last week.( with preposition)

………
6. Two young men are not good persons. You are acquainted with them.

(with preposition)

………
7. Mr. Brown is the man. I’m responsible to him for my work.( with preposition)

………
8. This young man was born in Paris. He went to London with his family.

(Relative pronoun)

……….
9. I saw a man and his cat. They are both lovely. (relative pronoun)

………
10. I don’t know the name of the woman. I met her at the bus station yesterday. (relative
pronoun)

………
<b>Phần 2</b>

<b>Choose one word whose underlined part is pronounced differently. </b>

<b>1.</b> A. population B. commune C. punctuality D.

stimulation

<b>2.</b> A. dissatisfaction B. spacious C. facsimile D.

telegram

<b>3.</b> A. comment B. solar C. ecologist D.

fossil

<b>4.</b> A. with B. tooth C. both D. tenth

<b>5.</b> A. pesticide B. city C. centreD.

campaign

<b>6.</b> A. survive B. service C. notifyD.

stimulate

<b>Choose one word whose stress pattern is different. </b>

<b>7.</b> A. eradicate B. expand C. announce D.

satisfy

<b>8.</b> A. distribute B. stimulate C. subscribe D.

affect

<b>9.</b> A. distance B. daily C. surfaceD. equip

<b>10.</b> A. capture B. endanger C. pesticide D.

devastate

<b>11.</b> A. extinct B. decrease C. affect D.

influence

<b>12.</b> A. prohibit B. increase C. chemical D.

announce

<b>13.</b> A. renewable B. infinite C. alternative D.

potential

<b>14.</b> A. consumption B. resource C. recipient D.

pesticide

<b>15.</b> A. maintenance B. geothermal C. satisfaction D.

prohibition

<b>Choose the one best answer to complete each sentence. </b>

<b>16.</b> This hotel has got a very________ kitchen.

A. spacious B. space C. spaceship

D. spacing

<b>17.</b> A ________is someone who sells meat.

A. baker B. butcher C. chemist

D. shopkeeper

<b>18.</b> A person who sells flowers is called a ________.

A. florist B. farmer C. vegetarian

D. biologist

<b>19.</b> We call a man who delivers the mail a ________.

A. newsman B. mailbox C. mailman

D. officers

<b>20.</b> We’d like to buy the house________ overlooks West Lake.

A. who B. whose C. where

<b>21.</b> The woman ________daughter Jack loves is very kind.

A. whose B. who C. whom

<b>22.</b> The letter ________she received this morning is from the USA.

A. whose B. who C. whom

<b>23.</b> I don’t know the girl ________is wearing a long blue dress.

A. whom B. whose C. which

<b>24.</b> Would you mind________ this parcel to Mr. Brown, please?

A. send B. sending C. to send

<b>25.</b> I would like to have my mails and newspapers________ early in the morning.

A. deliver B. delivery C. delivered

D. to deliver

<b>26.</b> Has she bought the dress ________yet?

A. that she is fond in B. which she is fond of C. who she wants it
D. which you made of

<b>27.</b> My father is the man________.

A. who I believe of B. whom I believe in C. whom I believe
into D. that I believe at

<b>28.</b> The man ________is the headmaster of that school.

A. who I am introduced B. to whom I am introduced

C. whom you are introduced about D. to who I am
introduced

<b>29.</b> There are a lot of species of being in the ________world.

A. alive B. living C. live

<b>30.</b> Human being have great ________on the rest of the world.

A. focus B. attention C. influence

D. attraction

<b>31.</b> Some snakes lay eggs, but others give birth to live________.

A. pesticide B. offsprings C. species

D. survival

<b>32.</b> Some chemical ________which farmers use to make the soil richer can pollute our
environment.

A. medicines B. elements C. fertilizers

D. proportion

<b>33.</b> Farmers use ________to kill insects that devastate their crops.

A. pesticides B. toothpaste C. cheese

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<b>34.</b> The society was set up to ______ endangered species from extinction.

A. prevent B. distinguish <b>C. preserve</b> D.

survive

<b>35.</b> People in this region cultivate mainly rice and vegetables.

A. destroy B. grow C. develop D.

support

<b>36.</b> Oil, coal and natural gas are ________.

A. nuclear energy B. fossil fuels C. plentiful D.
infinite

<b>37.</b> We try to make full use of our local________.

A. ecology B. potential C. economics D.

geothermal

<b>38.</b> Scientists have done researches on ________ activities of the world’s volcanoes.

A. sport B. ecological C. geothermal D.

geodetic

<b>39.</b> Vietnam is rich in ________ , such as coal, apatite, bauxite, etc.

A. natural resources B. seas C. land D. fish

<b>40.</b> Some people think nuclear power is the only real________.

A. alternation B. energetic C. alternative D.

fossil fuel

<b>41.</b> Do you know the girl ________ a long white dress?

A. wears B. to wear C. wear D. wearing

<b>42.</b> The house________ 40 years ago is still in good condition.

A. which built B. to build C. built D. building

<b>43.</b> I like the food________ by my mother.

A. was cooked B. cooked C. which cooked D.

cooking

<b>44.</b> Linda was the last student________ at the oral exam.

A. to be asked B. asking C. asks D. to ask

<b>45.</b> The man________ the bank is a millionaire.

A. is entering B. entering C. to be entered D.

enters

<b>Rewrite the following sentences in the passive voice: </b>
<b>46.</b> Someone can’t make a cake without sugar.

 A cake ___ can’t be made without sugar.
<b>47.</b> Dangerous driving causes many accidents.

 Many accidents

<b>48.</b> I was making coffee when the light went out.

 Coffee

<b>49.</b> She is telling us the news.

 We

<b>50.</b> The police haven’t arrested the man who stole your money.

 The man

<b>51.</b> Jonh will subscribe to Hoa Hoc Tro weekly magazine if he lives in Vietnam.

 Hoa Hoc Tro weekly magazine

<b>52.</b> When did people build this hotel?

 When

<b>53.</b> Mai cleans this room everyday.

 This room

<b>54.</b> That man is sending money to his relatives

 Money ________________________________________________________________________________________________
<b>55.</b> Somebody robbed the bank near our house last week.

 The bank _______________________________________________________________________________________________
<b>56.</b> Nobody has invited her to the party.

 She ___________________________________________________________________________________________________
<b>57.</b> Their father had driven them to the airport before we came.

 They __________________________________________________________________________________________________
<b>58.</b> People should send their complaints to the head office.

 Their complaints ________________________________________________________________________________________
<b>59.</b> They are introducing the game to students.

 The game ______________________________________________________________________________________________
<b>60.</b> You must fill in this form

 This form ______________________________________________________________________________________________
<b>Read the passage and answer the following questions:</b>

When you have a post-office box, the postman does not bring letters to you, but you
go to the post-office and get your letters and parcels from your box. The box is locked, and
you have the key, so the letters are quite safe.

One day, the headteacher of a school wrote to the post-office and asks for a post-office
box for his school. He soon got an answer. It said, “We will give you a post-office box in
one month.”

Three months later, the head teacher wrote to the post-office again and said, “Why
haven’t we got a post-office box yet?” This was how the post-office answered:

“ Dear Sir, We gave you a post-office box 2 months ago and wrote to you then to tell
you. Here is the key to your box. You will find our letter to you in it”

<b>61.</b> What happens when you have a post-office box?

 _______________________________________________________________________________________________________
<b>62.</b> Why are letters safe when they are in a post-office box?

 _______________________________________________________________________________________________________
<b>63.</b> Why did the headmaster write to the post-office?

 _______________________________________________________________________________________________________
<b>64.</b> Why did he write to the post-office 3 months later?

 _______________________________________________________________________________________________________
<b>65.</b> When do you think the headmaster will receive the key to his post-box?

 _______________________________________________________________________________________________________

<b>Combine these pairs of sentences, using WHERE, WHICH, WHO, WHOM, WHOSE, </b>

<b>THAT</b>

<b>66.</b> The girl is sitting by Jack. She is Mary.

 _______________________________________________________________________________________________________
<b>67.</b> Can you understand the question? He asked you the question last time.

 _______________________________________________________________________________________________________
<b>68.</b> Is that the girl? We saw her on T.V last night.

 _______________________________________________________________________________________________________
<b>69.</b> The farm produces milk. We visited it last Sunday.

 _______________________________________________________________________________________________________
<b>70.</b> At last he married the girl. He loved her.

 _______________________________________________________________________________________________________
<b>71.</b> The man is an engineer. We play with his daughter every day.

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

<b>73.</b> He often tells me something about his village. He was born there.



<b>74.</b> My sister wants to speak to you. You met her at my birthday party.



<b>75.</b> The children like the funny stories. Their grandmother tells them those stories every
evening.



<b>76.</b> Jack London is a famous American writer. He wrote “Iron heel”.



<b>77.</b> The boy is sitting next to Mary. He is Jack.



<b>78.</b> I didn’t receive the letter. My mother sent me the letter last month.



<b>79.</b> The factory makes exported furniture. We visited it yesterday.



<b>80.</b> The baby likes those songs. His grandmother sings those songs every evening.



<b>Read the passage and answer the following questions:</b>

The elephant is the largest animal to walk on Earth. An elephant can carry a load of
1,200 pounds. They eat 300 pounds of food a day. An elephant baby can weigh 200 pounds

at birth. Elephants can live up to 70 years. Elephants can be trained to carry logs with their
trunks. They also use their trunks for drinking water, bathing, eating and communicating.
There are two kinds of elephants: the African elephant and the Indian elephant. African
elephant can be characterized as larger ears. The African elephant grows up to 10 feet and
weighs as much as 12,000 pounds. The Indian elephant grows up to 9 feet tall, and weighs
up to 800 pounds. This elephant is characterized as smaller ears. Another name for the
Indian elephant is the Asian elephant.

<b>81.</b> What is the topic of the passage?



<b>82.</b> How much does a baby elephant weigh at birth?



<b>83.</b> According to the passage, can elephants use their trunks for eating?



<b>84.</b> Which kind of elephant is the largest?



<b>85.</b> Does an African elephant have smaller ears than an Indian elephant?



<b>Make conditional sentences for the following situations.</b>
<b>86.</b> The war will spread everywhere if we don’t stop it.

 Unless

<b>87.</b> All our beautiful forests will be destroyed if we do nothing to preserve them.

 Unless

<b>88.</b> If he hasn’t got a ticket, they won’t let him in.

 Unless

<b>89.</b> If it doesn’t rain, we will have no water to use.

 Unless

<b>90.</b> These flowers will die if nobody waters them.

 Unless

<b>91.</b> Do your exercises or you will be punished.

 Unless _________________________________________________________________________________________________
<b>92.</b> The building is too high. He can’t climb up.

 If _____________________________________________________________________________________________________
<b>93.</b> That house is too expensive. I can’t buy it.

 If _____________________________________________________________________________________________________
<b>94.</b> He didn’t work hard last term, he lost his job.

 If _____________________________________________________________________________________________________
<b>95.</b> Mary didn’t have money with her. She couldn’t buy that present.

 If _____________________________________________________________________________________________________
<b>96.</b> There was a test yesterday. You didn’t know that, so you didn’t study.

 If I had known that_______________________________________________________________________________________
<b>97.</b> Your friend was in the hospital. You didn’t know that, so you didn’t visit her.

 If I had_________________________________________________________________________________________________
<b>98.</b> I’ve never met your friend. You didn’t know that, so you didn’t introduce me.

 If I had_________________________________________________________________________________________________
<b>99.</b> It was cold yesterday, so I didn’t not go for a walk.

 If it____________________________________________________________________________________________________
<b>100.</b> I am tired so I can’t cycle to work.

 If I____________________________________________________________________________________________________
<b>Read the passage and answer the following questions:</b>

Scientists are now looking for cheaper way to use solar energy to heat air and water.
Many buildings are using solar energy to heat their water now. Solar unit on the roofs of
buildings collect the energy and use it to heat water. Although these units are still very
expensive, more and more people are buying solar hot water heaters. Universities and
colleges give solar energy courses where students learn to build their own solar collectors.
They are also many books that explain the construction of solar collectors. In the future,
there will be more and more solar collectors, especially in the sunny desert areas of the
world.

<b>101.</b> What are the scientists doing now?

_______________________________________________________________________________________________________
<b>102.</b> Are solar units cheap or expensive?

_______________________________________________________________________________________________________
<b>103.</b> Where do students learn to build their own solar collectors?

_______________________________________________________________________________________________________
<b>104.</b> Is solar energy expensive?

_______________________________________________________________________________________________________
<b>105.</b> Why?

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