1. found

2. would help

3. would give

4. would do

5. will be/am not

6. were/ would not go

7. rings

8. weren't/wouldn't be

9. would take

10. is/will go

11.was / were

12. would understand

13. had

14. Would people be able to fly / had

15. had / wouldn't have to
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1. The date of the meeting will be changed.

2.  If I had got a key, I could get in

3. Unless people work hard, they won't expect to be rich.
or Unless people work hard, they won't be rich.

4.  I'm not rich enough to take a space trip

5. In spite of being tired,she stayed up late to watch the late film on TV.

6. Because of being careless, Tim lost his job.