IV.
1. If the weather weren't too bad, we could go on a picnic this afternoon
2. A new bicycle factory is being built in our town
3. It is such a difficult grammar exercise that I can't finish it in only 10 minutes
4. She wishes she was a famous singer
5. The letter hasn't been finished yet by she
6. Ba said that he would have a test the following day
7. Kien told us not to talk in class
8. If I didn't get up late , I would have enough time for breakfast
9. More and more pollution is being produced by the factory
10. The doctor asked me how old my little sister was then
V.
1.A
2.B