Since или for. Урок английского языка

1. You haven't smoked sincefor two months.

2. We've been friends with Fred sincefor decades.

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

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

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

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

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

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

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

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