Since или for. Урок английского языка

1. I haven't met Jill sincefor the end of the school.

2. They haven't visited us sincefor Christmas.

3. They have been ill sincefor Monday.

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

5. He hasn't played the piano sincefor he was a boy.

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

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.