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 slept sincefor 48 hours.

5. We've lived here sincefor seventeen years.

6. I haven't worked sincefor a mounth.

7. We haven't seen Mary sincefor the party.

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

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

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