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 

51. I’d rather they (not say) anything. 52. No sooner they (start) the game than it (rain) heavily. 53. Hardly she (enter) the room when he (go) out. 54. By the time he opened the book, the teacher (tell) him to stand up. 55. She (have) a lot of trouble with her motorbike last week. 56. Mary and Tam (shout) when they (see) a snake. 57. I (not finish) writing this book yet. 58. I (graduate) from the university in 2001. 59. It is nearly 10 years since I (become) a teacher of English. 60. When I (arrive) at the movie, they were sitting on the chair.

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