II. Rewrite the sentence without changing the meaning.
1. Keep the environment clean is very important.
- It's ..........................................................................
2. They will show the time machine to the public when they finish it.
- The time machine................................................................................................
3. He was delighted to receive his aun's letter
- He was delighted that that................................................
4. Old car tires are recyled to make shoes and sandals
- People.........................................................................
5.I'm very sa that I wasn't accepted in that group.
- I'm very sad not.........................................................
6. It's three years since I last spoke to her.
- I haven't ...............................................................
7. Tam doesn't type as fast as she used to.
- Tam uesd..........................................................
8. It was such an interesting film that we watched it several times
- The film ..................................................................................................
9. Peter was too ill to get up.
-Peter was so.................................
10. How long is it since you used the pen?
- When.....................................................................?