1. Because there was a loud noise next to my doorlast night, I could not sleep.
2. Objects can be moved as big as a car by tornadoes.
3. If you behave yourself well, your parents will happy.
4. They cleared up the debris after providing food.
5. If I have free time, I will go some where.
6. If I knew the answer, I will tell you.
7. If they review them all hard, they will do the test well.
8. The villagers in the raged flood were evacuated to the safe place by the rescue workers last night.
9. Aids will be provided for the homeless people by the students tomorrow.
10. If people protect environment now, the environment will be nicer.
11. If they have a map, they will not have got lost.
12. Many houses were destroyed in this village by the storm last week.
13. My bicycle has been stolen.
14. Unless he works hard, he will not pass his exam.
II.
1. Because of the loud noise from the music club, the residents...
2. Vy had...stomachache since she...big dinner.
3. Due to the heavy rain, the road...flooded.
4. Because it...heavily, his mother...unhappy.
5. Too much carbon dioxide ( CO2 ) in the atmosphere causes global warming.
III.
1. Noise pollution causes a change in animals' living pattern.
2. Radoactive pollution...dangerous since it...growth.
3. The uninhabitable area made The Chernobyl nuclear accident happen.
4. Fossil fuels..., so Acid...produced.
5. Trees' leaves are damaged because of the dangerous of acid rain.
6. The tree...healthy because leaves are damaged.
IV.
1. destroyed -> were destroyed
2. had had -> had been having
3. pollute -> pollutant
4. will fine -> fines