I. 

1. B

2. B

3. B

4. A

5. C

II.

1. effective

2. installed

3. application

4. dripped

5. replication

III.

1. I suggest using energy-saving bulb.

2. What about going swimming?

3. I think we should use solar energy to save natural resources.

4. I suggest the electric fans should be turned off before going out.

5. Who will look after the baby when you go to work?

@hahoang207

~Good luck!!!~

Xin hay nhất + cảm ơn và 5* nha!!!

Sorry chj tại e vừa hk vừa tl nên hơi lâu ạ

I.

1.B

2.B

3.B

4.A

5.C

II.

1. effective

2. installed

3. application

4. dripped

5. replication

III.

1. I suggest using energy-saving bulb.

2. What about going swimming.

3. I think we should use solar energy to save natural resources.

4. I suggest the electric fans should be turned off before going out.

5. Who will look after the baby when you go to work.

Chúc bạn học tốt,...

Xin hay nhất.