Since или for. Урок английского языка

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

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

3. They have been ill sincefor Monday.

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

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. They've been in love sincefor three weeks.

10. New ideas have been put into practice sincefor he was elected our leader.