แบบทดสอบ Present perfect

1.She has worked for this company________1981.
   1. since
   2.for
2. Som hasn't met Sue________a long time.
   1.since
   2.for
3.They have been away______three hours now.
   1.since
   2. for
4.We have stayed at this hotel______Tuesday.
   1.since
   2.for
5.They have known each other ever_______they were small.
   1.since
   2.for
6.This robber has been in prison______more than a year.
   1. since
   2. for
7. The kettle has been boiling______ten minutes.
   1.since
   2.for
8. Man has been studying French_______six hours.
   1.since
   2.for
9. Nobody has come to see us_______we bought these bloodhounds.
   1.since 
   2.for
10. We have studies English_______many years.
    1.since
    2.for

_____________________________________________

Answer
1.1 2.2 3.2 4.1 5.1 6.2 7.2 8.2 9.1 10.2