Раскройте скобки
1. If you go in for sports; you (to feel) healthy and strong.
2. If you worked hard, you (to make) progress.
3. She (to save) a lot of time, if she had taken my advise.
4. If you (not to be) busy, we should go skiing.
5. What you (to think), if your friend didn't write you a letter?