I. Fill in the blank with for / since :
1. My father hasn’t met my uncle ______________ last month.
2. My uncle left our house three years ago, and we haven’t seen him ______________
3. I have been playing computer games _______________ 8 am this morning.
4. Their son has cleaned the floors ______________ three hours.
5. This machine hasn’t been used ______________ ages.
6. It has been raining ______________ lunchtime.
7. My boss will go away ________________ the next ten days.
8. I’m staying in London ________________ a year.
9. She has lived in London ________________ 1985.
10. Please hurry up ! We have been waiting _______________ an hour.
11. I have known her ________________ January.
12. Nam’s father has worked in that company _______________ 20 years.
13. Have you learned English _____________ a long time ?
14. I haven’t seen Tom _______________ we left school.
The house is very dirty. We haven’t cleaned it _______________
