Click on the button next to your answer. There is always only one correct answer. You needn't answer the questions in the given order, but you must answer all of them correctly to complete this exercise. Click on the arrows <= and => to go to the next or previous question. If you start this test again, the questions and answers will be given in a different order.

1. We've lived here _____ seventeen years.
   1.   ?    since
   2.   ?    for
2. Mandy has been ill _____ Monday.
   1.   ?    since
   2.   ?    for
3. They haven't visited us _____ Christmas.
   1.   ?    since
   2.   ?    for
4. Dinosaurs have been extinct _____ over 60 million years.
   1.   ?    since
   2.   ?    for
5. We haven't seen Mary _____ the party.
   1.   ?    since
   2.   ?    for
6. Jane has worked here _____ two weeks already.
   1.   ?    since
   2.   ?    for
7. My boss has been away _____ half a day only.
   1.   ?    since
   2.   ?    for
8. We have received no news _____ 5:30 pm.
   1.   ?    since
   2.   ?    for
9. We've been friends with Fred _____ decades.
   1.   ?    since
   2.   ?    for
10. I've read two books _____ the weekend.
    1.   ?    since
    2.   ?    for
11. Jane hasn't been back to Hungary _____ last year.
    1.   ?    since
    2.   ?    for
12. We've been together only _____ a few days.
    1.   ?    since
    2.   ?    for
13. I haven't slept _____ 48 hours.
    1.   ?    since
    2.   ?    for
14. She has been in hospital _____ Monday.
    1.   ?    since
    2.   ?    for
15. He hasn't played the piano _____ he was a boy.
    1.   ?    since
    2.   ?    for
16. You haven't smoked _____ two months.
    1.   ?    since
    2.   ?    for
17. Jane hasn't been to America _____ 1981.
    1.   ?    since
    2.   ?    for
18. I haven't worked _____ a month.
    1.   ?    since
    2.   ?    for
19. They have been ill _____ Monday.
    1.   ?    since
    2.   ?    for
20. I haven't met Jill _____ the end of school.
    1.   ?    since
    2.   ?    for