Ответ:

2. If Peter does a lot of excercise, he'll be fit and healthy

3. Please call me if you need any help

4. Will Sarah be angry if we don't go to her party?

5. Cathy will be able to go on a holiday if she saves enough money

6. Unless it rains, we will go outside

7. If you work hard, you may be promoted

8. Will you give me a call if you have time tomorrow?

9. If you don't do your homework, i will not let you watch TV

10. Mary won't go to Australia unless i pay for her tickets

11. If he arrives in time we'll have dinner before we go out.