11/ To keep the air unpolluted, people ought to use ………solar……….. energy to create electricity (sun)
12/our school has a lot of ………well-qualified…………………. Teachers (qualify)
13/ The internet has ……increasingly………… developed nowadays  (increase)
14/ Cuba gained ………dependence…….. from Spain in 1898 (depend)
15/ When speaking to young people,keep it ………simple……. (simplify)
16/ The building was completely ……destroyed…………………. by fire (destruction)
17/ My sister was a ………fluent……… speaker of Spanish (fluency)
18/ …………………Global………….. warming is now a major difficulty that we are faceing (globe)

11.solar
12. qualified

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

2. You can ask that plumber for ________ADVICE__________on how to repair the cracks in the water
pipes. (advise)
3. To keep the air unpolluted, people ought to use________SOLAR___________ energy to create
electricity. (sun)
4. Here is the weather forecast for tomorrow. Ha Noi will be clear and __________CLOUDY_________.(cloud)
5. She is said to be _______EFFICIENT_________. She always does her job well . (efficiency)
6. Can I borrow your ______UNUSED____________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 ___________ELECTRICIAN________ to look at it.
(electric)
8. There have been many __________INNOVATIONS__________ in the field of electrical engineering.
(innovate)
9. The high cost of heating and __________LIGHTING____________ prevents us from wasting electricity.
(light)
10. We must learn to save _______NATURAL________ resources or life will be very bad for the future
generation. (nature)
11. In a few years’ time, our houses will be________HEATED________ by solar energy. (hot)
12. ________CONSUMER _______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 ________CLOUDY__________ ( cloud ) .
14. He often has improvements in industry . He is an _________INNOVATOR______ (innovate)
15. Jogging is a very __________ENERGETIC______________ form of exercise ( energy )

conservation

innovation

consumption

irresponsible

1) A plumber is a person who installs and repairs things such as water pipes, toilet, etc. (plumbing)

2) Water is going all over the floor because of the dripping faucet. (drip)

3) You can ask that plumber for advice on how to repair the cracks in the water pipes. (advise)

4) To keep the air unpolluted, people ought to use solar energy to create electricity. (sun)

5) Here is the weather for tomorrow. Hanoi will be clear and cloudy (cloud)

6) Consumers are very demanding. They want products that are both of cheap and good quality. (consume)

7) We suggest replacing the light bulb. It is broken. (replacement)

8) Recycled products are of the same quality as those made from non-recycled material. (produce)

9) We must learn to save natural resources or life will be very bad for our children and our grandchildren. (nature)

10) In a few year’s time, our houses will be heat by the solar energy. (hot)

11) Since the world’s energy resources are limited, we must conservation them. (conservation)

12) I’m pleased that my secretary solved the problem efffectively (effect)

13) The high cost of heating and lighting prevents us from wasting electricity. (light)

14) With my small salary, I can’t afford basic necessaries like food, rent and fares. (necessitate)

15) There have been many innovation in the field of electrical engineering. (innovate)

16) No doubt that there will be a great shortage of food for the world’s population. (short)

17) Televisions, dishwashers, and freezers are electrical application (apply)

18) If there is something wrong with the lights, ask an electrician to look at it. (electric)

19) Can I borrow your useless dress? It’s been in the wardrobe for show since you bought it. (use)

20) Household bills are money for lighting, heating, etc. in your house. (house)

21) In many parts of the world where there are no fossil fuels, nuclear power is the only alternation (alter)

22) Proper ... of a car’s engine will preserve its performance and value. (maintain)

23) The installation of the new computer system at our office won’t be finished until sometime next week. (install)

24) She is said to be unefficient. She isn’t relied on to do her job properly. (efficiency)

25) Rather , researchers forecast that oil might run out in 30 years. (pessimism)

1. They live happily in a small village (happy)

2. You should spen your money and energy as economical as possible (economy)

3. You can buy waste products made from this factory (produce)

4. This library is open to all readers.(read)

5. Air and water are necessary in our life (necessary)

6. My brother can repair electric appliances very well (apply)

7. These innovations will conserve the earth (innovate)

8. Since the world's energy resources are limited, we must conserve them (conservation)

9. We suggest replacing the light bulb. It is broken (replacement)

10. To keep th air unpolluted, people ought to use solar energy to create electricity (sun)

1. They live happily in a small village.

2. You should spend your money and energy as economically as possible.

3. You can buy waste products made from this factory.

4. This library is open to all readers.

5. Air and water are necessary in our life.

6. My brother can repair electric appliances very well.

7. These innovations will conserve the earth.

8. Since the world's energy resources are limited, we must conserve them.

9. We suggest replacing the light bulb. It is broken.

10. To keep the air unpolluted, people ought to use solar energy to create electricity.

1.happily

2.economic

3.products

4.readers

5.necessary

6.applications

7.innvations

8.conserve

9.replacing

10.solar

good luck

* complete each of the following sentences with the correct form of the word in brackets .

29 . he is a .......successful (thành công)......(success) writer . His books are always loved by children .

30 . to keep the air unpolluted , people ought to use .....solar......(sun) energy (năng lượng mặt trời) to create electricity .

1. She switched the light off to save electricity 
2. To keep the air unpolluted, people ought to use solar encrgy to create electricity.

1. Electricity
2. solar

Word form:

1) Mount Pinatubo was the world's largest ... eruption in more than 50 years. (volcano)

volcanic

2) The new law will become ..effective. next week. (effect)

3) Speech ..distinguishes. human being from the animals. (distinct)

4) Thousand of people were .disastrously.. killed in that morning. (disaster)

5) Teacher's Day has been .celebrated.. widely since 1982. (celebrate)

6) Thousand of people died in the .disaster.. . (disastrous)

7) They always show an understanding of what .consumers.. want. (consume)

8) We worry about the ... effects that violent films have on children. (destroy) destructive

9) Earthquakes often come together with volcanic ..eruption. . (erupt)

10) All this shows that the machine works ... . (effective) effectively

11) People must learn about keeping the environment ..unpolluted . (pollute)

12) Halloween is an interesting festival which is .celebrated.. in many countries. (celebrate)

13) If we keep on .polluting. the air, more people will suffer from respiratory diseases. (pollution)

14) ... are interested in the protection of the environment. (conserve) Conservationists

15) We find advertising on television very ... . (effect) effective

16) Nobody likes him because he's so ... . (considerate) inconsiderate

17) His generosity .distinguishes.. him from others. (distinguish)

18) Who encourages the use of ... friendly products? (environment) environmentally

19) The company must reduce costs to compete ... . (effect) affect

20) If you are ... with your essay, I suggest you rewrite it. (satisfy) satisfied

21) He has been ... as the representative of his company. (normination) norminated

22) ... friendly energy sources include water and wind power. (environment) Environmentally

23) A tidal wave is strong enough to cause ... . (destroy) destruction

24) There are twenty .appliants.. for that job. (apply)

25) Are you writing a .complaint.. letter to our local authority? (complain)

26) There have been many .innovations.. in the field of electrical engineering. (innovate)

27) The most ... earthquake occured in Japan in 1923. (disaster) disastrous

28) Most buildings in this city are ... by solar energy. (hot) heated

29) I hope that everything go on ..satisfaction. . (satisfy)

30) My sense of humor .distinguishes.. me from others. (distinction)

31) Vehicles also account for air .pollution.. in the cities. (pollute)

32) We should pay attention to genetic and ..environmental. influences on infant sleep. (environment)

33) We are responsible for the truth that our forest is being ..destroyed. . (destroy)

34) Sometimes it can be difficult to stay motivated and ..effective. at work. (effect)

35) The company is trying to create a young .energetic.. image. (energy)

36) Thomas Edison is one of The 12 greatest .innovators.. of all time for inventing the first long-lasting light bulb. (innovate)