Question I: 

1. D  2.A  3.A  4.D  5.D  6.D  7.D  8.D

Question II:

1.recycle  2.won't dump  3.will be  4.will save  5.will have  6.were  7.would be  8.had 

9.wouldn't be upset  10.would grow

Question III:

1. If teachers teach environmental at school, students will be more aware of protecting the environment

2. If light pollution happens, animals will change their behaviour patterns

3. If we switch from nuclear power to renewable resources, the levels of radoiactive pollution will decrease

4. If the temperature increases, some aquatic creatures will unable to reproduce

Question IV:

2. If there weren't so many billboards, people could enjoy the view

3. If there were less light in the city at night, we could see the stars clearly

4. If we didn't turn on the heater all the time, we wouldn't have to pay three million dong for electricity a month

5. If the bars didn't make so much noise almost every night, the residents wouldn't complain to its owner

6. If she didn't work in a office, she wouldn't have a headache after work every day

Phần II bài đọc 

1.B  2.C  3.C  4.B  5.D

D. Rewrite

I.

1. How far is it from your house to your school?

2. I used to walk to school when I was a student 

3. In spite of the fact that they are short, they still love playing sports

4. It's about  kilometers from her house to the city center

II

1. How far is it from your house to the market?

2. Where did you buy that T-shirt for your father?