Put the correct form of the words in brackets. 

1. Coal is plentifulplentinentplentifully, but we still have to use it economically. (plenty)

2. The movement of waves and tides in the ocean can be able to generate electronicelectricityelectrical. (electric)

3. Scientists are looking for clean and affectineffectiveeffective sources of energy. (effect)

4. Non-renewable energy are not environmentalenvironmentalistenvironmentally friendly and can have detrimental effect on our health. (environment)

5. Natural gas is less pollutedpollutionpollutant than coal or crude oil. (pollute)

VI. Write the correct form of the words in brackets.
1. Solar, win, and hydro are renewable and _______________________(exhaust)
2. Coal is also _________________, there is a large reserve globally.(plenty)
3. The movement of waves anf tides can be able to generate_______________(electric)
4. Scientists are looking for clean and_____________sources of energy.(effect)
5. Non-renewable sources are not___________________friendly and can have serious effect on our
health.(environment)
6. Natural gas is less_______________than coal or crude oil(pollute)
7. Energy resources are often _____________as renewable or nonrenewable, (category)
8. Turning off electrical appliances when they are not m use is a great way to reduce
energy_______________(consume)

giải thích giùm với a

Use the correct form of the verbs in brackets.
               Will people still read books in 50 years’ time? Scientists think that we will still read books. But  books of the future 
(1. be) ______ similar to the books we have today? The answer is no. In the future, we will only need (2. buy) ______ one book. 
With this one book we will be able (3. read) ______ novels, plays, and even newspapers. It might (4. look) ______ like today’s books, but it (5. be)______  electronic.  When we press a  button,  words (6. appear) ______ on the page. When we want 
(7. read)______ a different story, we can push the button again, and a new story (8. appear) ______ instantly.

III. Supply the correct form of the words in brackets.
1. This dress is too short. I may be able to (long) ………………………….. it.
2. There is a temporary (short) ………………………….. of sugar in the shop.
3. After several (succeed) ………………………….. attempts we have finally done it.
4. Most British homes have a (choose) ………………………….. of four television channels.
5. When Pele retired, it was a great (lose) ………………………….. to the Brazilian soccer.
6. She had an outward (appear) ………………………….. of calm, but she was really worried.
7. Why don’t you go to the police? It’s the most (reason) ……………………….. things to do.
8. You should be careful when using (electric) ………………………….. appliances.
9. Jean said she (accident) ………………………….. destroyed her ID card.
10. She got very angry but later she (apology) ………………………….. for her impatience.

. Put the correct form of words in the brackets, using used to or didn’t use to.

1. I (go) ____________ to work by bus but now I drive my car to work.

2. Joe and I (like) _____________ each other but now we are best friends.

3. Sue (fancy) _______________ rock music but now she is a fan of it.

4. _________________ (you/catch) fireflies when you were a child?

5. My father (smoke) _______________ a lot but he gave up three years ago.

6. My student (be) __________ very bad at Math but now he improves a lot.

7. This doctor (be) ___________ famous but now everyone knows him.

8. Jane (break) _______________ the speed limit and a police officer stopped her.

9. My aunt (work) _______________ as a nurse before she retired.

10. My hometown (have) _______________ an amusement park but the authorities have opened one

Use the correct form of the word in brackets to complete the following sentences.

Each of the following sentences has an error. Find the errors and correct them.

1.   Nuclear powers production in the US is controlled by the Nuclear Regulatory Commission [NRC].

2.   All of we students must have an identification card in order to check books out of the library.

3. A fiber-optic cable across the Pacific went into service in April 1989, link the United States and Japan.

4.   A good artist like a good engineer learns as much from their mistakes as from successes.

5.   Almost all life depends to chemical reactions with oxygen to produce energy.

Fill in each of the sentences with correct prepositions.

1.   He is always getting............... trouble because of his carelessness.

2.   You cross a cheque............... drawing two lines in it and writing & co like this.

3.   Not many old people approve................. the ways of the younger people.

4.   The local people look down................ anyone who throws litter around their lovely park.

5.   The editor never puts up................ articles that they are boring.

mọi người làm và giải thích ra hộ em nhé

VI . Give the correct form of the words given to complete the sentences :

1. Solar energy is renewable , ............ and clean . PLENTY

2. We should reduce the use of .......... at home . ELECTRICITY

3. Waves will be used as an ........... friendly source of energy . ENVIRONMENT

4. Solar power can be used to ............ or cool our house . HOT

5. There will be a ......... of energy in the near future . SHORT

6. Scientists are looking for clean and........ sources of energy. EFFECT

7. More renewable energy sources will be used to solve the problem of ........... POLLUTE

Use the correct form of the words in brackets

1.     We used to ______________ in many activities of communal center.           (participation)

2.     I can do all of these exercises ______________                                                     (easy)

3.     He was ___________ of his achievements in the field of politics.                         (pride)

4.     His _________________ of some words is not correct.                                     (pronounce)

5.     Her ________ prevented her from success.                                                         (nervous)

6.     We finished the test __________                                                                         (excellent)

7.     The teacher is pleased with the __________ in my study.                                    (improve)

8.     He is an __________ student.                                                                               (excellence)

9.     Students should only learn __________ words.                                                 (importance)

10.  __________ is necessary.                                                                                      (revise)