I.
1. B 4. B
2. C 5. A
3. B
II.
1. D
2. C
III.
1. B
2. A
IV.
1. were/ would you do
2. had done/ went
3. won't lose/ eat
7. was built
8. had left
9. has been played
V.
1. poisonous
2. culture
3. pollution
4. contaminated
5. contamination
6. attraction
7. environmetalists
8. industrial
9. death
VI.
1. Unless he work hard, he won't pass hiss exam.
2. If I had free time, I could go somewhere.
3. Beacause Vy ate a lot last night, she had a stomachache.
4. After my mother had gone to work, I got up.
5. Objects can be moved as big as a car by tornadoes.
