() 2. While I T-shirts on the Inter- net,Mary came to see me.

   A. bought   B. buy

   C. was buying   D. am buying

() 1. — at 8 o'clock yesterday?

—I was doing my homework.

   A. What do you do

   B. What were you doing

   C. What did you do

   D. What are you doing

5. She is having a good time in the park now.(改为 同义句) 

She is in the park now.

4. She was doing homework when her mother came back.(改为同义句) 

she was doing homework,her mother came back.

3. Don’t forget to tell me the truth.(改为同义句)

 tell me the truth.

2. She was singing at nine o’clock yesterday.(改为 一般疑问句) 

she at nine o’clock yesterday?

1. They were playing soccer at this time yesterday.(对画线部分提问) 

 they at this time yesterday?

5. Maria is (surprise) to see the girl in the park.

3. She (read) an English book at that time.

4. The old man (die) three years ago.

2. Please remember (close) the windows before going out.