Since или for. Урок английского языка

1. I haven't slept sincefor 48 hours.

2. We've lived here sincefor seventeen years.

3. I haven't worked sincefor a mounth.

4. We've been together only sincefor a few days.

5. I've read two books sincefor the weekend.

6. She has been in hospital sincefor Monday.

7. He worked at that company sincefor ten years before he retired.

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

9. New ideas have been put into practice sincefor he was elected our leader.

10. Joe and Josephine have been going out together sincefor Valentine's Day.