Hãy sử dụng thì Quá khứ hoàn thành hoặc thì Quá khứ đơn hoặc thì hiện tại hoàn thành cho mỗi động từ trong ngoặc
21. The last time I (play) football was five years ago. 22. While he was sitting on a chair, he (find) out the mistake. 23. Not until I (leave) home did I realize how much I love my father. 24. Who are you waiting for? You (be) her for 6 hours. 25. His parents (die) when he (be) nine years old. 26. After the earthquake, they (become) homeless. 27. He (work) as a manager before he (retire). 28. They said that they (meet) him the night before. 29. She (be) absent from school because of her illness. 30. It (be) very kind of you to help me. Without your help, I couldn’t have finished my homework
1 played
2 found
3 left
4 have been
5 died - was
6 became
7 had worked - retired
8 had met
9 was
10 was