giúp em với mọi người ơi=')))

1. I was having lunch (when/while) Hoa arrived.

2. (when/while) I was sleeping, my mom was cooking.

3. I went to the door (when/while) I heard the doorbell.

4. He was working (when/while) I called him.

5. (when/while) I saw Jack, he was with Tim.

6. I cut my finger (when/while) I was cooking.

7. He hurt his back (when/while) he tried to lift the bed.

8. (when/while) we were standing outside the cinema, someone picked my pocket.

9.  (when/while) Minh was studying, he often listened to music.

10. Lan was very unhappy (when/while) things weren't going well for her.
11. Nhi came into the room (when/while) I was sleeping.
12. She was walking back to her flat (when/while) she heard an explosion.
13. I read book (when/while) waiting for the bus.
14. Go straight and you get to a church. (when/while) there, take the next turning right.
15. I will wake up (when/while) you arrives. 

Giải thích:

-Trong thì quá khứ tiếp diễn, When được dùng để diễn tả một hành động xảy ra trong một thời gian ngắn thì có hành động khác chen ngang ngay lập tức. 

-Trong thì quá khứ tiếp diễn, While dùng để diễn tả hai hay nhiều hành động xảy ra song song đồng thời trong cùng một thời điểm.