Complete each sentences with the correct form of one of the given verbs given.
1. Burning coal and oil ........................ carbon dioxide that harms the environment.
2. Many families ........................ biogas.
3. Using non-renewable energy sources ........................ the environment.
4. Solar power can be ........................ into electricity.
5. There ........................ a shortage of energy in the near future.
6. Producing biogas energy ........................ burning waste, and this may have bad impacts on the environments.
7. Coal is a non-renewable source of energy, because it cannot be easily ........................
8. The wind turns turbines to ........................ energy.
VI Choose the correct answer (A, B, C or D).
1. The wind, the sun, and the wave are some types of .................. sources of energy.
A. changeable B. alternative C. cheap D. costly
2. Remember to .................. the lights before going to bed.
A. turn B. turn on C. turn off D. stop
3. People will reduce energy .................. as much as possible.
A. consume B. consumption C. expense D. expenses
4. Nuclear power is expensive and dangerous .................. our environment.
A. for B. to C. in D. with
5. Human is looking for a clean, cheap and .................. sources of energy.
A. effective B. effect C. effectively D. effectiveness
6. Low energy light bulbs should be used to .................. electricity.
A. spend B. buy C. convert D. save
7. We must .................. the amount of water our family used every day.
A. lower B. reduce C. lessen D. narrow
8. At this time next month we .................. to Ha Long Bay for a holiday.
A. will go B. will going C. will be gone D. will be going
9. By the middle of the 21st century, people in developing countries .................. more renewable energy.
A. uses B. will be using C. used D. have
10. Fossil fuels are very common in our society but they .................. the environment.
A. renew B. provide C. waste D. pollute
VII Give the correct form of the word given to complete the sentence.
1. Tidal energy is renewable, ............................ and clean. (plenty)
2. Wind will be used as an ............................ friendly sources of energy. (environment)
3. There are many ways will be used to solve the problem of .................... (pollute)
4. Solar power can be used to ............................ or cool our houses. (hot)
5. ............................, fossil fuels are harmful to the environment. (fortunate)
VIII Find and correct the mistake in each sentence.
1. You can save the electricity by turn off the lights when not using them....
A B C D
2. He will clean his house at 9 am tomorrow. .........
A B C D
3. My sister will be buying a house in the city center next year. .........
A B C D
4. They will build a five-stars hotel on this street. .........
A B C D
5. A solution for the environment problem will soon be finding by scientists.
A B C D
C. READING 
IX Fill in each blank in the following passage with one suitable word.
With the development of science and technology, more and more (1) ......................... is used every day. Nowadays, many (2) ......................... areas in Vietnam have been electrified, and more (3) ......................... is needed. If everyone (4) ......................... energy, it will quickly run out. (5) ......................... at school should learn how to (6) ......................... energy, for example, they should turn (7) ......................... the electric lights when they leave their classrooms. Moreover, we may waste electricity at home if we use a lot of light (8) ......................... By not wasting energy, we will save a lot of (9) ......................... resources, such as (10) ......................... and oil.
X Read the passage and answer the questions given.
Many people still believe that natural resources will never be used up. Actually the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative 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 don’t approve of 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 most effective thing is that we should use natural resources as economically as possible.
Answer the questions:
1. Can natural resources be used up someday?
.......................................................................................................................
2. What should we do if we don’t want the natural resources to run out of?
.......................................................................................................................
3. Why don’t people prefer using nuclear power?
.......................................................................................................................
4. What does the radioactivity cause for young people?
.......................................................................................................................
5. What will you do to protect your environment?
.......................................................................................................................
Write complete sentences, using the words given:
1. Burning coal and oil / release / poisonous gases / which / be /harmful / humans.
...........Burning coal and oil releases poisonous gases which are harmful to humans.........................................................
2. New methods / farming / help / increase productivity.
......New methods of farming have helped increase productivity...............................................................
3. Lately / not work / hard / as / should.
.....Lately, You haven’t worked hard as you should................................................................