11. Put the verbs in brackets in the Present Perfect tense:
1. Peter and his brother (leanr) .................................English for three years.
2. Mr. Green (play)....................................chess since eight o' clock.
3. It (not rain).......................................since last week.
4. We (not see)..................................our new teacher yet.
5. I (study).......................................verry hard for this examination.
6. My uncle (work)...............................in this factory for ten years.
7. She (see)......................................this flim before.
8. The weather (be).................................quite good since Christmas.
9. I (have)..............................................this bike since1 was a teenager, and i still use it.
10. He (play)..........................................for the football clup for several years, but it's time to leave now.