I

1. The sun

2. Roofs

3. Renewable

4. Are

5. Non - polluting

II

20. The government have to find a solution to reduce traffic jams.

21. The first hydroelectric power was built by them at Nigara in 1879

III

1. Solar energy will be used in the word by many country.

2. How will you travel from one place to another ?

3. We will reduce the use of electricity to save our energy.

IV

1. Isn't it

2. Do they

3. Does it

4. Shouldn't they

5. Can we

* Change

1. A hydropower station will be built by them in the north of country

2. These chemicals are sold everywhere in my hometown.

3. The lights will be turned of by my children when going to bed

                           CHÚC BẠN HỌC TỐT

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I

1. The sun

2. Roofs

3. Renewable

4. Are

5. Non - polluting

II

20. The government have to find a solution to reduce traffic jams.

21. The first hydroelectric power was built by them at Nigara in 1879

III

1. Solar energy will be used in the word by many country.

2. How will you travel from one place to another ?

3. We will reduce the use of electricity to save our energy.

IV

1. Isn't it

2. Do they

3. Does it

4. Shouldn't they

5. Can we

* Change

1. A hydropower station will be built by them in the north of country

2. These chemicals are sold everywhere in my hometown.

3. The lights will be turned of by my children when going to bed