Điền since hoặc for:
1. I have lived in London ______________ six months. (since/for)
2. I have danced ___________ I was small. (since/for)
3. She hasn't had a day off ___________ three months.
4. I've lost so much flexibility _______________ I injured my leg.
5. They have all improved in attitude ___________ the headmaster talked to them.
6. Wars have been happening _____________ centuries, it won't ever change.
7. I haven't been on holiday ___________ ages.
8. I haven't eaten that much ______________ Christmas.
9. I haven't been on holiday _____________ last year.
1. for
2. since
3. for
4. since
5. since
6. for
7. for
8. since
9. since