Chia động từ trong ngoặc ở thì quá khứ đơn hoặc hiện tại hoàn thành:
1. What she (do) when you (arrive) there? She (write) a letter
2. She (have) her bath while her sister (get) the breakfast ready
3. The storm (begin) at half past ten while the class (study) history
4. When the students (hear) the bell, they (get) up and (leave)
5. Mr harvey (ask) me about my plans the next time he (see) me
6. Just as I (leave) for home, a student (stop) me in the hall
7. As I (cross) the street, two cars (race) by me at full speed
8. Dorothy and I (just leave) the house when the telephone (ring)
9. The minute I (hear) the news, I (send) hima telegram
10. I (go) to ask you to help me, but you (sleep) so peacrfully when I (look) into your room that I (decide) to do it alone
11. My mother (arrive) while I (clean) the kitchen
12. John (work) from morning to night he (study) to be a doctor
13. Just as I (write) the letter, the inkpot (fall) over
14. A noise of breaking chairs (suggest) the the men (fight)
15. He (just close) the church door when he (notice) a man still praying in the corner
16. The men (fight) bravely, but the general (order) them to retreat
17. As he (come) up to his house in the darkness, he (see) that a man (climb) out of one of the bedroom windows
18. John (work) hard when suddenly the door (open)
19. When we (open) the front of door we (see) someone walking out of the gate
20. Lightning (strike) the tree that they (shelter) under. Of course, they (have) a terrible fright, but they (be) very lucky. No harm (come) to them at all
