Since или for. Урок английского языка

1. My boss has been away sincefor half a day only.

2. She has been in hospital sincefor Monday.

3. They have been ill sincefor Monday.

4. Jane hasn't been back to Hungary sincefor last year.

5. Jane has worked here sincefor two weeks already.

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

7. He's been working in the field sincefor early this morning.

8. They have been raising horses and cows on their farm sincefor many years.

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

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