Complete the sentence below.

1. Margaret has lived in Spain... a long time. a) for b) since
2. I haven't had a holiday... last summer. a) for b) since
3. Patrick is really tired. He has been awake... four o'clock this morning. a) for b) since
4. New Zealand has been an independent country... 1947. al for b) since
5. Dinosaurs have been extinct... millions of years. a) for b) since
6. Mr. Smith has been away from his desk... for a few minutes. a) for b) since
7. Jenny and I have been friends ... we were kids. a) for b) since
8. The store has been closed... last Wednesday. a) for b) since
9. Michael has had the same job... ten years. a) for b) since
10. I've been so busy that I haven't slept ... two days! a) for b) since
11. We're ready to leave. In fact, we've been ready... an hour. al for b) since
12. Sam and Martha have owned their new car ... April. a) for b) since 13. I haven't watched TV ... the day yesterday. a) for b) since
14. Isabella hasn't ridden her bicycle she fell off it last week. a) for b) since
15. I'm really hungry! I haven't eaten this moming. al for b) since
16, Iceland has been inhabited... only about a thousand years. a) for b) since
17. My neighbors have been away on holiday... several weeks. a) for b) since
18. Our universe has existed... billions of years. a) for b) since​