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