Đề cương ôn tập học kì 2 môn Tiếng Anh 11 năm 2018-2019 - Trường THPT Thái Phiên - Pdf 58

TRƯỜNG THPT THÁI PHIÊN
TỔ NGOẠI NGỮ
ĐỀ CƯƠNG ÔN TẬP KIỂM TRA HỌC KỲ 2- NĂM HỌC : 2018 - 2019
MÔN TIẾNG ANH 11-CTC
I.MA TRẬN BÀI KIỂM TRA HKII
Nội dung
I.Trắc nghiệm:
1. Pronunciation
2. Stress
Grammar : Relative clauses
(Defining and non-defining
relative clauses, Relative
pronouns with prepositions,
Relative clauses replaced by
participles and to infinitive,
Omission of relative pronouns),
Cleft sentences, Could be able to,
Tag questions, not only…but
also…, both…and…, neither
…nor…., either…or…
3. Error identification:
4. Language function
6. Vocabulary: (Topic: The post office,
nature in danger, Sources of energy, The
Asian Games, Hobbies, Space Conquest)
+ Word form / Word meaning
+ Synonym / Antonym
7.Read a passage and fill in the suitable
8. Read a passage and choose the
suitable answers (Topic : The post office,
nature in danger, Sources of energy, The


1

2
2

2
1

1

1

1

1

Tổng cộng
0.25 x 32= 8đ

0.5 x 4= 2đ

1

II. NỘI DUNG KIẾN THỨC:
1.
Từ vựng: Từ vựng theo chủ đề từ Unit 9 đến Unit 15 (trừ Unit 14) (The post office, nature in
danger, Sources of energy, The Asian Games, Hobbies, Space Conquest)
2.
Ngữ pháp:

4.
A. nervous
B. modern
C. verbal
D. polite
II. GRAMMAR, VOCABULARY and STRUCTURES:
Choose the best answer among A, B, C or D to complete each of the following sentences .
5. Everyone is really satisfied with the _______conditions of this post office.
A. security
B. secure
C. securely
D. securities
6. We offer a speedy and secure service of __________ money in less than 24 hours.
A. transfer
B. transfers
C. transferring
D. transferred
7. When will I have my telephone line _________________at home?
A. installed
B. installation
C. install
D. installing
8. By cutting down the trees, we harm the _______ habitat of birds and animals.
A. nature
B. naturally
C. natured
D. natural
9. She is talking about the author __________ book is one of the best-sellers this year.
A. that
B. which

C. whom
D. which
16. Either my father or my mother _______ to the meeting.
A. go
.
B. have gone
C. is going
D. are going
Mark the letter A, B, C, or D to indicate the most suitable response to complete each of the following
exchanges.
17. - “ John had an accident . He’s been in hospital for 5 days .” - “ ______________ “
A. Poor it!
B. Poor him!
C. How terrific !
D. Oh, is he ?
18. “- I’m sorry about that!”
“- ____________!”
A. That’s right
B. Of course
C. You’re welcome
D. It’s Ok
Mark the letter A, B, C, or D to indicate the underlined part that needs correction.
19. We are working, that means that we are contributing goods and services to our society.
A
B
C
D
20. Do you ever feel that life is not being fair to you because you cannot
A
B

Stamp collecting is the collecting of postage stamps and related objects, such as envelopes or
packages with stamps on them. It is one of the world’s most popular hobbies, with estimates of the number of
collectors ranging up to 20 million in the United States alone.
Many casual collectors enjoy accumulating stamps without worrying about the tiny details, but the
creation of a large or comprehensive collection generally requires some philatelic knowledge. This is especially
important for those who intend to spend large amounts for stamps.
Stamp collectors are an important source of revenue for some small countries that create limited runs of
elaborate stamps designed mainly to be bought by stamp collectors. The stamps produced by these countries
far exceed the postal needs of the countries.
Some collectors, observing the generally rising prices of rare stamps, have taken to Philatelic
Investment. Rare stamps are among the most portable of tangible investments, and are easy to store. They
offer an attractive alternative to art, other collectible investments, and precious metals.
25. The estimated number of stamp collectors in the United States is _________
A. 30 million
B. 20 million
C. 10 million
D. 15 million
26. Philatelic knowledge is especially important for _________
A. many casual collectors enjoy
B. some small countries
C. those who intend to spend large amounts for stamps
D. the postal needs of the countries
27. Why have some collectors taken to Philatelic investment? – Because they ________
A. have observed the generally rising prices of stamps.
B. have observed the generally rising prices of rare stamps.
C. have observed the generally low prices of stamps.
D. haven’t observed the generally rising prices of stamps.
28. The word they in paragraph 4 refers to __________
A. Stamp collectors
B. Small countries

1. They work in a hospital which is sponsored by the government. (Reduce the relative clause)
à They _________________________________________________________________________.
2. The airport is very modern. We are going to arrive at this airport.(Combine the sentences, using a
relative pronoun after preposition)
à The airport _________________________________________________________________________
3. Do you know the man? You talked to his daughter last night. (Combine the sentences, using a relative
pronoun)
à Do you know _________________________________________________________________________
II. Make a complete sentence using the words given.
4. Water / create /electricity / when / move / a high place / a lower place.
à _________________________________________________________________________
---------THE END---------


SAMPLE TEST 2
PHẦN A: TRẮC NGHIỆM: (8.0pts)
I. PHONETICS:
Mark the letter A, B, C, or D to indicate the word whose underlined part is pronounced differently from that
of the others.
1.
A. facial
B. communicate
C. contact
D. carpet
2.
A. sometimes
B. gestures
C. interests
D. examples
Mark the letter A, B, C, or D to indicate the word that has a different stress pattern.

C. effective
D. effectively
9. ________ taught me how to distinguish footprints of different animals.
A. My grandfather that
B. It was my grandfather that
C. It is my grandfather which
D. My grandfather who
10. He’d better go to bed early, _________?
A. would he
B. wouldn’t he
C. hadn’t he
D. had he
11. I’m afraid that I _______________ come to your party.
A. won’t be able to
B. can
C. could
D. couldn’t be
12. The football match __________ my friend played in was very exciting.
A. whose
B. what
C. X
D. whom
13. A famine was the reason __________ so many Irish people emigrated to the USA in the 19th century.
A. for that
B. of which
C. why
D. which
14. My mother, __________ everyone admires, is a famous teacher.
A. whom
B. that

Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word.
21. People in this region cultivate mainly rice and vegetables.
A. grow
B. destroy
C. develop
D. support
22. A lot of effort has gone into making this event a great success.
A. time
B. solidarity
C. attempt
D. cooperation
Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word (s)
23. The merry wedding ceremony took place outdoors. It’s beautiful and picturesque!
A. scenic
B. ugly
C. pretty
D. aesthetic
24. Solar energy is not only plentiful and infinite but also clean and safe.
A. uncountable
B. unlimited
C. limited
D. inflexible
III. READING.
1. Read the passage and choose the word among A, B, C, or D that best fits each blank.


Moving air turns the blades of large windmills or generator to make electricity, or to pump water out of
the ground. A high wind speed is needed to power wind generators effectively. While wind generators don’t
produce any greenhouse gas emissions they may cause vibrations, noise visual pollution. While wind generated electricity does not cause air pollution, it does cost more to produce than electricity generated from
coal.

Greek Olympic Games, which began in 776 B.C. The ancient Greeks played these games to honour their gods.
The ancient Romans related athletic games to military skills, not religion. They did such sports as boxing,
wrestling, chariot racing and throwing spear-like sticks called javelins.
After ancient times, people continued to play sports, but they were usually unorganized. Organized
sports became more common in the 1700’s and 1800’s. People created leagues and other organizations to
control athletic competitions. They also wrote down sets of rules for different sports.
29. What is the aim of a sport?
A. It is a battle.
C. It is for fun and for competition.
B. It is an activity for worshiping the gods.
D. It is for improving military skills.
30. How long have people played sports?
A. Recently in our modern age.
C. For thousands of years.
B. For a short time up to now
D. For hundreds of years.
31. What games were popular with ancient people?
A. Games with balls.
B. Hunting.
C. Racing
D. Boxing and wrestling.
32. When did organized sports become more common?
A. In ancient time.
C. In the 1700’s and 1800’s.
B. In 776 B.C.
D. When people had rules for games.
PHẦN B: TỰ LUẬN: (2.0 pts):
I. Rewrite the sentence so that it has the same meaning as the first one or do as directed:
1. A building was destroyed in the fire. It has now been rebuilt. (Use a relative pronoun to combine the
sentences)

C. difficulty
D. understanding
4.
A. reserve
B. schedule
C. wildlife
D. beauty
II. GRAMMAR, VOCABULARY and STRUCTURES:
Choose the best answer among A, B, C or D to complete each of the following sentences .
5. Vichai felt disappointed after his ______________.
A. perform
B. performing
C. performance
D. performative
6. Drawing and designing fashion are among her many _________________.
A. achievements
B. achieves
C. achieved
D. achieving
7. The spaceship ___________ from the ground.
A. landed
B. took off
C. traveled
D. fell
8. His talents are not fully _________ in Asian Games.
A. appreciates
B. appreciation
C. appreciate
D. appreciated
9. Ms. Loan, ___________ many of her students are writing, is living happily in Ho Chi Minh City.

15. Let’s go for a drive, ____________?
A. shall we
B. don’t you
C. should you
D. shall you
16. In space, astronauts have to suffer from ________.
A. weight
B. weightlessness
C. heaviness
D. pressure
17. This multi-sport event is an occasion when friendship and ________ are built and promoted.
A. knowledge
B. solidarity
C. effort
D. enthusiasm
18. The singer was _________on the piano by her sister.
A. played
B. performed
C. accompanied
D. helped
Mark the letter A, B, C, or D to indicate the most suitable response to complete each of the following
exchanges.
19. “ What’s the best place to eat lunch?”
- “ ……………………..”
A. I’ll have soup, please.
B. I usually eat lunch at twelve.
C. There’s a great restaurant at the corner of the street.
D. Twelve would be convenient
20. “Excuse me. I am your new neighbor. I just moved in.” _ “………………….”
A. Sorry, I don’t know.

each of the questions from 25 to 28
Long ago a lot of people thought the moon was a god. Other people thought it was just a light in the
sky. And others thought it was a bib ball of cheese! Then telescopes were made. And men saw that the moon
was really another world. They wondered what it was like. They dreamed of going there.
On July 20, 1969, that dream became true. Two American men landed on the moon. Their names
were Neil Armstrong and Edwin Aldrin. The first thing the en found was that the moon is covered with dust. The
dust is so thick that the men left footprints where they walked. Those were the first marks a living thing had
ever made on the moon. And they could stay there for years and years. There is no wind or rain to wipe them
off. The two men walked on the moon for hours. They picked up rocks to bring back to earth for study. The dug
up dirt to bring back. They set up machines to find out things people wanted to know. Then they climbed back
into their moon landing craft.
Next day the landing craft roared as the two men took off from the moon. They joined Michael Collins
in the spaceship that waited for them above the moon. Then they were off on their long trip back to earth.
Behind them they left the plains and tall mountains of the moon. They left the machines they had set up. And
they left footprints that may last forever.
25. The story tells…………………………….
A. about the first men to walk on the moon
B. how men found footprints on the moon
C. what the men brought back from their trip to the moon
D. who had left footprints on the moon before the two men landed there
26. A telescope……………………
A. makes balls of light seem brighter
B. turns the moon into another world
C. makes many of men’s dreams come true
D. makes faraway things seem closer
27. The men brought rocks and dirt from the moon because………………….
A. they wanted something to show they were there
B. people wanted to use them to learn about the moon
C. they wanted to keep them as souvenirs
D. they might sell them to scientists

PHẦN B: TỰ LUẬN: (2.0 pts):
I. Rewrite the second sentence beginning with the words given so that it has the same meaning as the
first one or do as directed:
1. I found the man’s wallet. He gave me a reward (Combine the sentences, using a relative pronoun)
→ _______________________________________________________________________
2. I met Mr. Smith on the train to Hanoi two weeks ago ( Rewrite the sentences, using a Cleft sentence)
→ It was________________________________________________________________________
3. The rules that allow public access to wilderness areas need to be reconsidered. ((Reduce the relative
clause into present participle phrase)
à_________________________________________________________
II. Make the complete sentence using the words given.
4. Once / use up / natural resources / can never / replace.
à ________________________________________________________________________
---------THE END---------


SAMPLE TEST 4
PHẦN A: TRẮC NGHIỆM: (8.0pts)
I. PHONETICS:
Mark the letter A, B, C, or D to indicate the word whose underlined part is pronounced differently from that
of the others.
1. A. decreased
B. influenced
C. endangered
D. established
2. A. small
B. supply
C. sure
D. species
Mark the letter A, B, C, or D to indicate the word that has a different stress pattern.

9. The girl ___________ I borrowed the dictionary asked me to use it carefully.
A. to who
B. to whom
C. from that
D. from whom
10. The pollution _________ they talked at the conference last week is getting worse.
A. whose
B. about which
C. in which
D. that
11. Edinburgh is the town __________ Alexander Graham Bell was born.
A. where
B. in that
C. which
D. on which
12. I don't like the boy ________ Sue is going out.
A. with whom
B. of whom
C. for whom
D. whom
13. . Let’s go for a drive, _______________?
A. shall we
B. don’t you
C. should you
d. shall you
14. You used to play tennis, _______________?
A. you did
B. did you
C. didn’t you
D. you didn’t

20. Mary : “ Let’s go camping”
Jack: “ ___________ The weather is not so good today”
A. No problem
B. Just bring yourself
C. Oh, I don’t think it’s a good idea
D. Yes, let’s do that
Choose the underlined part among A, B, C or D that needs correcting.
21. The students who they cheated in the examination had to leave the room
A
B
C
D
22. I invited 20 people to my party, some of them are my former classmates.
A
B
C
D
Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word.
23. He disapproved of the behavior his sons displayed during the church service this week.


A. comment
B. support
C. blame
D. like
24. I was horrified to find a drug tablet which had been left on purpose in my room yesterday.
A. ashamed
B. shocked
C. nervous
D. surprised

28. What do well-educated collectors often collect today?
A. Fossil, plants, artifacts, and other objects.
C. Rare manuscripts and art treasures.
B. Valuable objects.
D. Extensive
B. Read the passage and choose the word among A, B, C, or D that best fits each blank.
A major revolution for the automated office is electronic mail. The customary (29) _______ system
requires message written on paper to be transmitted physically from one location to another. With electronic
mail, messages are converted (30) _____ electronic signals, transmitted (31) _____ in the world, and then
changed back into the original written form, all in several seconds and minutes at most.
Through the use of video screens in company offices, a single document can be transmitted to
hundreds of people in dozens of branch offices at the same time. Thus, electronic mail, along with (32) ______,
can be an important asset in teleconferences. Furthermore, the use of electric mail in the form of a 'mailbox'
attached to a telephone is also of great value. Since in offices many telephone calls go uncompleted on the first
attempt, with electronic mail, two-way conversion is not essential, so it reduces telephone use and saves time.
29. A. post
B. postal
C. postage
D. posting
30. A. from
B. by
C. into
D. with
31. A. anywhere
B. wherever
C. somewhere
D. everywhere
32. A. programs
B. graphics
C. websites

D. abundant
Mark the letter A, B, C, or D to indicate the word that has a different stress pattern.
3. A. endanger
B. disappear
C. prohibit
D. distribute
4. A. promotion
B. gravity
C. discussion
D. computer
II. GRAMMAR, VOCABULARY and STRUCTURES:
Choose the best answer among A, B, C or D to complete each of the following sentences .
5. Though Timmy is a distant ____________ of mine, we are pretty close to each other.
A. relative
B. relation
C. relationship
D. relate
6. The Asian Games are usually a good chance to promote international _________
A. friends
B. friendly
C. friendliness
D friendship
7. Gas and oil ________ always increases in cold weather.
A. consumption
B. consume
C. consumer
D. consuming
8. Remember to ___________ at the school gate at 6.30 tomorrow and then we’ll go for a picnic.
A. collect
B. see

C. has left/ had happened
D. left/ happened
15. I can’t remember the hotel ______ last summer.
A. that he stayed
B. in where he stayed
C. where he stayed
D. which he stayed
16 I am the only representative from our school in the competition, _______________?
A. aren’t I
B. am not I
C. are I
D. aren’t you
Mark the letter A, B, C, or D to indicate the word CLOSEST in meaning to the underlined word.
17. The president delivered a speech in front of a large audience of investors.
A. went over
B. made
C. announced
D. handed over
18. I can consume 1 kg of rice at a time.
A. at once
B. one by one
C. once in while
D. off and on
Mark the letter A, B, C, or D to indicate the word OPPOSITE in meaning to the underlined word.
19. People in the village no longer use water in that well because of its pollution.
A. cleanliness
B. garbage
C. contamination
D. refreshment
20. He wants to find a temporary job or a seasonal one.

D. loving
32. A. education
B. non-education
C. educationally
D. educational
PHẦN B: TỰ LUẬN: (2.0 pts):


I. Rewrite the second sentence beginning with the words given so that it has the same meaning as the
first one or do as directed:
1. Mr Jones was very generous about overtime payments. I was working for him.
( Combine the sentences, using a relative pronoun after preposition)
à ______________________________________________________________________________
2. David doesn’t play tennis. David doesn’t play table-tennis. (Combine the sentences, using neither ……...nor )

à ______________________________________________________________________________
3. The secretary was the only person to be offered a pay rise. (Use relative pronoun to rewrite the
sentence)
à ____________________________________________________________________
II. Make the complete sentence using the words given.
4. vegetables/ sold / this supermarket /be/ grown /without/ chemicals.
à _______________________________________________________________________________
---------THE END---------

SỞ GD & ĐT TP. ĐÀ NẴNG
TRƯỜNG THPT THÁI PHIÊN
Đề chính thức

ĐỀ KIỂM TRA HỌC KỲ II NĂM HỌC 2017-2018
MÔN: TIẾNG ANH- LỚP 11 (Chương trình chuẩn)


9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

A. only lead
B. useful gases
C. acid rain
D. carbon monoxide and lead
4. According to the passage, what are the most serious sources of pollution?
A. Oil, cooking, and water drainage
B. Acid rain, car exhaust fumes, and oil spills
C. Water irrigation, smog, and rubbish
D. Garbage disposal, forest fires, and garbage
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions or do as directed:
5. You often have bread and milk for breakfast, ___________?
A. haven’t you
B. have you
C. do you
D. don’t you
6. Mark the letter A, B, C, or D to indicate the word CLOSEST in meaning to the underlined word.
Newspapers and magazines are often delivered early in the morning.
A. offered
B. given
C. provided
D. distributed
7. Mark the letter A, B, C, or D to indicate the underlined part that needs correction.
The flight on whom I wanted to travel was fully booked.
A
B
C
D
8. Mark the letter A, B, C, or D to indicate the word OPPOSITE in meaning to the underlined word.
I always remove the stamps before discarding the envelopes.
A. dispending

14. Mark the letter A, B, C, or D to indicate the underlined part that needs correction.
Neither Mary nor Peter like working in this office. They are looking for new jobs.
A
B
C
D
15.Despite the bad weather, he _________ get to the airport in time.
A. could
B. couldn’t
C. was able to
D. can
16. It is __________ I get emotional satisfaction.
A. collecting stamps that
B. from collecting stamps that
C. collecting stamps from that
D. collecting stamps that from
17. John: “That’s a very nice dress you’re wearing”. – Nam: “____________.”
A. I’m glad you like it
B. That’s all right
C. That’s nice
D. You’re quite right
18. 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
19. The book_________ by Xuan Dieu is a best-seller.
A. wrote
B. written
C. writing

2. Gas and oil ________________ always increases in cold weather. ( consume)
3. Nomadic life should be _______________ because it does harm to the environment. ( courage)
4. Vietnam is one of the _______________ advanced countries. ( industry)

II. Read the passage and then fill in each blank with ONE suitable word. (1.0m)
Many people still believe that natural resources will never(1) ____________ used up. Actually, the world’s
energy resources are limited. Nobody knows exactly how much fuel left. However, we also should use them


economically and try to find (2) ______________ sources of power. According to Professor Marvin Burnham of
the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and
nuclear power is the only alternative. However, many people do not approve (3) _____________ using nuclear
power because it is very dangerous. What would happen if there were a serious nuclear accident?
Radioactivity causes cancer and may badly affect the future generations. The (4) _____________ effective
thing is that we should use natural resources as economical as possible.
III. Rewrite each of the sentences so that it is closest in meaning to the original one or do as directed:
(2.0 ms)
1. Mr Andy has done a lot of researches on that subject. (Rewrite the sentence, using Cleft sentence)
____________________________________________________________________________
2. The chickens haven’t been fed; the pigs haven’t been fed either . (Rewrite the sentence, using " neither
........ nor " )
________________________________________________________________________________
3. Only a few of the movies are suitable for children. They are shown at the Gray Theater . ( Combine the
sentences, using relative clause replaced by Past participle phrase)
_______________________________________________________________________________
4. We / offer / speed and secure / service / transferring money / less / 24 hours..( Write a complete sentence
with the words given).
________________________________________________________________________________
---------------------THE END-------------------SỞ GD & ĐT TP. ĐÀ NẴNG
TRƯỜNG THPT THÁI PHIÊN

actually endangering our very existence. We cut down rich rainforests and replace them with one species
plantations, such as pine and eucalyptus. We plough up meadows rich in different grasses and herbs and replace
them with one grass, for instance rye or wheat.
When a natural ecosystem is simplified , the basic processes in the ecosystem are altered and even damaged.
Without their biodiversity, they are not able to serve as the natural cleaners of our planet. No longer are they able to
absorb the carbon dioxide that is being produced in excess. The result is global warming, caused by the increase in
the 'greenhouse effect', and ultimately, or even 'sooner, there will be' a change in the world's climate.
1. Which of the following is the best title for the passage?
A. The Loss of Biodiversity
B. Natural mechanisms.
C. The Variety of Species
D. How Ecosystems Work Better
2. Which of the following is not a species used to replace a rich ecosystem?
A. Pine
B. Rye
C. Eucalyptus
D. Herbs
3. What is the purpose of paragraph 2?


A. To show natural mechanisms at work.
B. To give examples of the variety of species
C. To give example of loss of biodiversity
D. To show how ecosystems can work better.
4. What, according to the passage, might be the final result of the simplification of natural ecosystems?
A. The basic processes are altered
B. There is a change in the climate.
C. There is global warming
D. There is loss of biodiversity.
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions or do as directed:

A. haven’t come
B. has come
C. have come
D. hasn’t come
11. Mark the letter A, B, C, or D to indicate the word that has a different stress pattern.
A. comment
B. advance
C. arrive
D. respect
12. . Mark the letter A, B, C, or D to indicate the word that has a different stress pattern.
A.national
B. exhausted
C. natural
D. plentiful
13. We need to make sure that our waste will be____________ and will not pollute the environment.
A. harmless
B. harmful
C. harm
D. harmed
14. . It_________ the postcard _________was sent to me on her holiday.
A. is / that
B. was / that
C. is / which
D. was/ Ø
15. I was talking to a man _________has worked with my father since last week.
A. when
B. whose
C. who
D. which
16. Laura: “Thank you for a lovely evening!” - Phong: “______________”

A. event
B. match
C. tournament
D. incident
23. Mark the letter A, B, C, or D to indicate the word CLOSEST in meaning to the underlined word.
There are many other pursuits such as listening to music, reading, and gardening
A. hobbies
B. sport
C. courses
D. decisions
24. Mark the letter A, B, C, or D to indicate the underlined part that needs correction.
A dam is a wall building across a river to stop the river’s flow and collect the water.
A
B
C
D
SECTION B (4.0ms)
I. Complete each of the sentences with the correct form of the word in brackets (1.0m)
5. I’m afraid they weren’t very _____________ about your idea of going out this evening. ( enthuse)
6. Gas and oil ________________ always increases in cold weather. ( consume)
7. Nomadic life should be _______________ because it does harm to the environment. ( courage)
8. Vietnam is one of the _______________ advanced countries. ( industry)

II. Read the passage and then fill in each blank with ONE suitable word. (1.0m)
Many people still believe that natural resources will never(1) ____________ used up. Actually, the world’s
energy resources are limited. Nobody knows exactly how much fuel left. However, we also should use them
economically and try to find (2) ______________ sources of power. According to Professor Marvin Burnham of
the New England Institute of Technology, we have to start conserving coal, oil and gas before it is too late; and



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