Xin ctlhn ạ

1.I was just buy a toy.

2.I was thinking about him last night.
3.We were just talking about it before you came.

4. She was cooking dinner at 5 p.m yesterday.

5.They were playing badminton when I came yesterday. 

6. He wasn’t working when his boss came yesterday.

7. We weren’t watching TV at 9 p.m yesterday.

8. Was your mother going to the market at 7 a.m yesterday?

9.Were they staying with you when I called you yesterday?

10.I was studying English while my brother was listening to music last night

1. When I was walking home it began to rain

2. She was writing a letter at 10 o'clock last night

3. I was reading a book in bed while he was listening to music 

4. We were going out last night

5. While I was taking a bath, she was using the computer

6. At 9 A.M yesterday, he was watching the cartoon on TV

7.  When I was cooking, the light went out.

8. When he worked here, he was always making noise

9. He was planting trees in the garden at 4 pm yesterday.

10. Anne was riding her bike to school when Peter saw her yesterday.