EX9. Điền “for” hoặc “since” vào chỗ trống sao cho thích hợp.
1. I have learned Japanese _________ 3 months.
2. May has been working for a non-profit organization _________ I graduated.
3. Kim has been unemployed _________ half a year.
4. I miss my friend. I haven’t seen her _________ months.
5. We have lived in the dorm _________ our first year at university.
6. Jim and Jane have known each other _________ quite a long time.
7. The baby’s hungry. He hasn’t eaten anything _________ the morning.
8. Have you used this laptop _________ 4 years?
9. They’ve been close friends _________ they started college.
10. My grandmother has been a vegetarian _________ several year