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. These cherry trees have bloomed every spring sincefor 1980.

8. I haven't talked to him sincefor last week.

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

10. They've been teaching here sincefor quite a long time.