Bài 1. Chia động từ trong ngoặc ở thì Quá khứ hoàn thành (Past Perfect)
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(Chấp nhận cả dạng viết đầy đủ và viết tắt)
1. She (finish) her homework before she went to bed.
2. They (leave) the station before the train arrived.
3. I (eat) breakfast before I went to school.
4. Tom (clean) his room before his friends came.
5. We (see) that movie before we watched it again.
6. My father (repair) the bike before I used it.
7. Mary (write) the email before the meeting started.
8. The students (complete) the test before the teacher collected it.
9. He (lose) his wallet before he found it again.
10. Anna (visit) Hue before she traveled to Da Nang.
11. They (buy) the tickets before the concert began.
12. My brother (read) the book before he watched the film.
13. We (not finish) dinner when the guests arrived.
14. The baby (fall) asleep before his mother came back.
15. Jack (do) his homework before he played games.
16. I (never / see) such a beautiful place before that trip.
17. My parents (live) in Ho Chi Minh City before they moved to Hanoi.
18. She (already / leave) when I arrived.
19. The teacher (explain) the lesson before the students asked questions.
20. They (build) the bridge before the new road opened.
