Since или for. Урок английского языка

1. Jane hasn't been to America sincefor 1981.

2. I haven't met Jill sincefor the end of the school.

3. I haven't slept sincefor 48 hours.

4. We've lived here sincefor seventeen years.

5. She has been in hospital sincefor Monday.

6. He hasn't played the piano sincefor he was a boy.

7. Jane has worked here sincefor two weeks already.

8. These cherry trees have bloomed every spring sincefor 1980.

9. John and Bob have been working on this project sincefor five months already.

10. They've been in love sincefor three weeks.