3. When did you buy your bike?

--.

   A. For 3 years

   B. Since I was 7 years old

   C. When I was 7 years old

   D. Since 3 years ago

2.— has Jack read English novels?

-Since he was five years old.

   A. How often   B. How long

   C. How soon   D. How many

1. My mother has taught English over twenty years.

   A. for   B. since

   C. of   D. after

4. You (play) computer games for a long time. It is bad for your eyes.

5. I think it's hard (sell) old things.

3. We are planning some special events that bring back sweet (memory) .

2. We (be) friends for the whole ten years.

1. -- How long your father(work) in the factory?

--Since he (leave) college.

5. —What did you buy for your mother on Mother's Day?I bought her a (围巾) .

3. The sofa is very (柔软的) and comfortable.

4. Did you (检查) your homework yesterday?

2. I he mother usually tells her son that s things are bad for his teeth.