Since или for. Урок английского языка

1. I haven't slept sincefor 48 hours.

2. We've lived here sincefor seventeen years.

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

4. They have been ill sincefor Monday.

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

6. Jane has worked here sincefor two weeks already.

7. He's been working in the field sincefor early this morning.

8. John and Bob have been working on this project sincefor five months already.

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

10. They've been teaching here sincefor quite a long time.