I. Choose the word A, B, C or D that best fits the blank space in each sentence.(3 pts )
1. People know they should save energy ; _____________ , they still waste it
A. however B. so C. and D. but
2. Easter is a joyful festival which happens ______ around the same time ____ Passover.
A. at/on B. at/to C. on/as D. at/as
3. They will help you _______ you try your best
A. so long as B. as long as C. if D. All are correct
4. How well you are playing! – “ .”
A. Say it again. I like to hear your words B. I think so. I am proud of myself
C. Many thanks. That is a nice compliment D. Thank you too much
5. “My father couldn’t fix the TV set.” –“………. send for a repairman?”
A.Let’s B. Why don’t you C. I suggest D. A and B are correct
6. You should have a mechanic _________ your motorbikes regularly
A. check B. checking C. to check D. checked
7. How___________ our household bills are! We can’t pay them
A. heavy B. high C. enormous D. large
8. Now she can make ………. she used to.
A. three times as the money as B. three times as much money as
C. as much three times money as D. three times as much the money as
9. Solar panels are ___________on the roofs of a house to receive the energy from the sun.
A. hung B. made C. used D. installed
10. What does the sign say?

A. Touch the light. C. Please turn off lights when not in use.
B. No sunlight. D. Risk of electric shock.
11. Schools ……………………. are experiencing a shortage of teachers
A. nationally B. widely C. nationwide D. together
12. ______there have been many changes in his life, he still remains a nice man to everyone.
A. However B. Despite C. Because D. Although

II/ Use the correct form of the word given in each sentence. (1.5pts)
13. He had worked ………. all day on his new book. ENERGY
14. If an area is …….. , all the trees there are cut down or destroyed. FOREST
15. SO 2 is one of several _____________ that damage the environment. POLLUTE
16. Everyone loves him because of his __________________ GENEROUS
17. There is a _______________ temple on the way home. JEW
18. “I’ll give you a lift .”- Thank you, but that’s quite ___________ NECESSITY

Bài 4: Người ta truyền tải đi một công suất điện là 1 000 kW từ một nhà máy
điện, bằng đường dây dẫn có điện trở tổng cộng là 5 , hiệu điện thế phát ra từ nhà máy nối
với đường dây tải là 5 000 V. Tính:
a/. Công suất hao phí do tỏa nhiệt trên đường dây.
b/. Nếu tăng hiệu điện thế hai đầu đường dây lên đến giá trị 50 000 V, thì công suất hao phí do
toả nhiệt trên đường dây là bao nhiêu?
c/. Để tăng hiệu điện thế hai đầu đường dây từ giá trị ở câu a lên đến giá trị ở câu b, người ta
đã dùng máy biến thế đặt ở đầu đường dây. Cho biết số vòng dây của cuộn thứ cấp máy
biến thế này là 20 000 vòng. Hãy tính số vòng dây của cuộn sơ cấp.
Bài 5: Người ta truyền tải đi một công suất điện có giá trị là 10 MW, bằng
đường dây dẫn có điện trở 4 , và đặt vào hai đầu đường dây một hiệu điện thế xoay chiều là
20 kV. Tính:
a/. Công suất hao phí do tỏa nhiệt trên đường dây.
b/. Để công suất hao phí do tỏa nhiệt trên đường dây giảm đi 25 lần, hiệu điện thế ở hai đầu
đường dây dẫn phải có giá trị mới là bao nhiêu?

IV/ WORD FORMS:
1. Water is going all over the floor because of the _________________ faucet. (drip)

2. You can ask that plumber for __________________on how to repair the cracks in the water
pipes. (advise)
3. To keep the air unpolluted, people ought to use___________________ energy to create
electricity. (sun)
4. Here is the weather forecast for tomorrow. Ha Noi will be clear and ___________________.(cloud)
5. She is said to be ________________. She always does her job well . (efficiency)
6. Can I borrow your __________________dress? It’s been in the wardrobe for show since you
bought it. (use)
7. If there is something wrong with the lights, ask an ___________________ to look at it.
(electric)
8. There have been many ____________________ in the field of electrical engineering.
(innovate)
9. The high cost of heating and ______________________ prevents us from wasting electricity.
(light)
10. We must learn to save _______________ resources or life will be very bad for the future
generation. (nature)
11. In a few years’ time, our houses will be________________ by solar energy. (hot)
12. _______________are very demanding. They want products that are both cheap and of good
quality. (consume)
13. It is going to rain and the sky is __________________ ( cloud ) .
14. He often has improvements in industry . He is an _______________ (innovate)
15. Jogging is a very ________________________ form of exercise ( energy )

III / Sentence transformation

1. I think you should go to work by bike .
Why don’t _______________________________________ ?
2. What about doing morning exercises in this park?

I suggested that
3. Let’s have lunch at my uncle’s house this weekend.
I suggest..............................................................................
4. The world’s energy resources are limited, so we should use them economically. (Therefore)
...........................................................................................................................................
5. Why don’t you get him to make sure the pipes in your house ?
 I suggest _______________________________________
6. We are busy . so we won’t join you now .
Since ___________________________
7. What about making posters on energy saving ?
How _____________________________________
8. Peter worked very hard but he didn’t get a scholarship. (However)
-------------------------------------------------------------------------------------
9. His wife said, “ Let’s have dinner after the theatre.”
His wife suggested ----------------------------------------------
10. “ Why don’t you repair the electric fan , Ba ?”
She suggested----------------------------------------------------
11. He forgot his umbrella , so he got wet .
He forgot his umbrella ………………………………………………………………
12. I have to take care of my little sister when my parents are away
I have to look …………………………………………………………………………
13. His father wanted him to go abroad for further studying .
His father suggested ……………………………………………………………….
14. Don’t use baths because we use more water than showers
Baths use twice …………………………………………………………………….
15. He not only works hard but also actively takes part in school activities
Not only …………………………………………………………………………..
16. He can not only speak English but also write it well
Not only ……………………………………………………………………..
17. His wife continued complaining about his coming home late
His wife went …………………………………………………………………………….
18. This mother always looks after her children carefully .
This mother always takes …………………………………………………………………..
19. Don’t forget to switch the lights off before going outside the house.
Don’t forget to ……………………………………………………………..

V / Read the passage and then fill the blanks with the best words:
These days it is impossible to open a newspaper without reading about the __ (1) __ we
are doing to the environment. The earth is being __ (2) __ and the future looks bad. What can
each of us do?
We cannot clean up our __ (3) __rivers and seas overnight. Nor can we stop the __ (4) __ of
plants and animals. But we can stop adding to the problem while scientist __ (5) __ answers and
laws are passed in nature's defense.
It may no be easy to __ (6) __ your lifestyle completely but some steps are easy to take: __
(7) __. The amount of driving you do ,or use as little plastic as possible . It is easy to save energy,
__ (8) __ also reduces household bills. We must all __ (9) __ a personal decision to work for
the future of our planet __ (10) __ we want to ensure a better world for our grandchildren.
1. A. harm B. damage C. destruction D. ruin
2. A. threatened B. taken C. pushed back D.occupied
3. A. poisoned B. polluted C. polluting D.poisonous
4. A. death B. disappearance C. appearance D. ruin
5. A. look for B. look into C. look up D. look over
6. A. alter B. change C. transform D. turn
7. A. cut off B. cut out C. cut in D. cut down
8. A. of which B. of that C. which D. that
9. A. get B. come C. give D. make
10. A. if B. whether C. when D. while

II/ Read the passage and answer the question :
Air pollution is a serious problem in many cities. Motor vehicles, factories and other source create so
much air pollution that it may hang in the air like dirty fog. Air pollution threatens the health of the
people who live in cities. City wastes cause water pollution when they are poured into the waterways.
These wastes kill fish and make some areas unfit for swimming. In addition, many large cities have
difficulties in disposing their garbage. The amount of garbage grows each year, but places to put it are
quickly filling up Citizens, governments, industries, scientists and business people must work
together in different ways to gradually reduce pollution.
True ( T ) or False ( F ) in the space provided
1/ Air pollution is a serious (dangerous) problem in many cities . __________
2/ Air pollution doesn't cause danger to people's health in some cities
3/ Motor vehicles and factories are some of sources of air pollution . ____________
4/ Only factories are the main source of air pollution ._________
5/ Air pollution is the only problem of the environment in this passage .
6/ Some areas are unfit for swimming because of the city wastes .____________
7/ The amount of the garbage in large cities reduces each year ._________
8/ Everyone must cooperate to reduce pollution . ______________

III/ Read the passage and answer the question :
Everyone wants to reduce pollution, but the pollution problem is as complicated as it is serious.
It is complicated because much pollution is caused by things that benefit people. For example,
exhaust from motorbikes causes large percentage of air pollution. But the automobile provides
transportation to millions of people. Factories discharge much of the material that pollutes air
and water, but factories give employment to a large number of people.
Thus, to end or reduce pollution immediately, people would have to stop using many things that
benefit them . Most people do not want to do that, of course. But pollution can be gradually
reduced in many ways. Scientists and engineers can work to find ways to lessen the amount of
pollution that such things as automobiles and factories cause. Governments can pass and enforce
laws that require businesses and individuals to stop or to cut down on certain polluting activities.
True ( T ) or False ( F ) :
1. All people want to reduce pollution_____
2. Pollution problem is neither complicated nor serious_____
3. Pollution is brought about by things that benefit people_____

4. People have to sacrifice what they have to stop or reduce pollution_____
5. The government can't do anything to stop or reduce pollution.______
IV/ Read the passage and answer the questions:
Every day on radio, on TV and in the newspapers, we hear , see, read about many problems in
the world , for example , pollution problems.
Air pollution is the first kind. It mostly comes from fumes released from motorbikes, cars,
airplanes, trains and poisonous gases emitted from factories. Also, waste is dumped anywhere even
in the city where many people are living. The second pollution is sea pollution. Many people earn
their living from fishing the sea, and the fish they catch feed many people. But the sea has become so
polluted from oil spills and factory wastes that the fish are dying. This pollution is not only killing the
fish, but also affecting those people who eat fish.
Seldom do you find a place nowadays that is not polluted. This problem is growing more
difficult every day. We must find a good solution that makes the world a better place to live.
True — False — Not given?
1. Pollution is one of the city's problems_____
2. Exhaust fume comes from vehicles , airplane and factories_____
3. People pollute seas from dynamite fishing____
4. You can find easily a place nowadays that is not polluted_____

1. You should ( reduce / recycle / reuse ) the amount of water by taking showers
2. If I don’t fix the faucets , It ( waste / wasted / will waste ) hundreds of liters of water a month
3. William suggested ( stay / staying / to stay ) at home for a change
4. ( Electrician / Plumber / Scientists ) is a person who installs and repairs water pipes
5. We should take a shower instead of a bath to save ( energy / time / environment )
6. I feel ( disappointing / disappointed / disappointment ) that people have spoiled this area
7. You should get a ( painter / worker / plumber ) to fix the pipes .
8. I suggest he ( should go / goes / going ) to the cinema tonight .
9. Are you worried ( at / about / from ) your recent water bill ?
10. Please ( turn on / go on / turn off ) the TV in case nobody watches it .
11. I think you should use public buses ( for / instead of / replacing ) motorbikes
12. This rule is ( twice / twin / two times ) as long as that one
13. What ( happen / happens / will happen ) if you pollute the water ?
14. A ( dripping / driping / dripped ) faucet can waste 500 liters of water a month
15. Don’t ( complain / complaint / complained ) about this and that . No one wants to hear you .
16. Many fish died ( of / about / from ) electric shock waves
17. People spend much money ( on / with / for ) advertising
18. He wanted to replace his old mobile phone (on / with / for ) a new one
19. This building is high compared ( with / to / in ) those in my neighborhood
20. These children used to live in ( luxurious / luxury / luxuriously )
21. He loves her ( and / but / or ) she loves him , ( because / as / so ) they are getting married
22. Mr Jones seems poor ( and / but / because ) he has a lot of money ( and / but / since ) he lives in
a big house.
23. Quynh could go to upper-secondary school without ( take / takes / taking ) the entrance
examination ( and / but / because ) she won the school ‘s Best Student Prize this year
24. The air is polluted ( however / but / as ) there is too much traffic
25. The new appliance does not only work…………… but also saves energy.
A. effect B. effective C. effectively D. effectiveness
26. Who will.......... …… the cat when you are away on business?
A. turn on B. go on C. look after D. wait for
27. Scientists are ………………….. an effective way to reduce energy consumption
A-going on B- looking for C-looking after D-taking care of
28. I suggest ………………. a show to raise money.
A. organize B. organizing C. organizer D. to organize

29. Can you turn …………………………the light? It’s too dark.
A. on B. off C. in D. for
30. In Western countries electricity , gas and water ……necessities
A. was B. has been C. have D. are
31. People like to use energy from _______ such as the sun, the wind or the water
A. natural resources B. natural sources C. planet energy D. world energy
32. Only hard work will save this company _______ bankruptcy.
A. from B. off C. of D. for