Since или for. Урок английского языка

1. We have received no news sincefor 5:30 pm.

2. You haven't smoked sincefor two months.

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

4. I haven't worked sincefor a mounth.

5. They have been ill sincefor Monday.

6. You have been watching TV sincefor hours.

7. Dinosaurs have been extinct sincefor over 60 million years.

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 in love sincefor three weeks.