1. If the soil weren't badly polluted, trees and glasses could grow here.
2. She told me to sign the paper again.
3. Because of the dangerous acid rain, trees' leaves are damaged.
4. This house was built yesterday.
5. If the land weren't polluted, the farmers wouldn't be unable to grow crops.
6. The house has been tidied for Tet by the Smiths.
7. He hasn't met her since 2005.
8. The young man said that he had to go to Cairo the next day.
9. The fire was made in the traditional way.
