一、用 for 或 since 填空。
1. I have studied English six years.
2. He has been a teacher 2018.
3. We have lived here last month.
4. She has had the bike two years.
5. They have known each other they were 8 years old.
6. I have waited for you half an hour.
7. He has worked in this factory 5 years ago.
8. We have had this dog last summer.
9. She has practiced dancing three years.
10. My grandfather has been ill Monday.

1. for
2. since
3. since
4. for
5. since
6. for
7. since
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9. for
10. since