1. _________you ever __________ (call) in sick at work when not ill? C-4 ____________
2. It is the third time that I ______________ (come) to Beijing. C-5 ____________
3. While I _______________ (study) in my dorm, my roommates were talking loudly with their friends. A-2 ____________
4. She showed me the pictures that she _______________ (paint). D-1 ____________
5. We finished the work earlier than we _______________ (expect). D-1 ____________
6. He said that he ____________ (be) in China for over five years. D-1 ____________
7. Sorry, something ____________ (come) up. I have to leave now. C-1 ____________
8. He ________________ (be) there ever since you left! C-2 ____________
9. I heard that they ____________ (make) an important discovery. D-1 ____________
10. Up until then we ______________ (only cover) half the distance. D-2 ____________
11. I am afraid I ____________ (offend) her. She is not talking to me now. C-1 ____________
12. She stared at the painting, wondering where she _________ (see) it. D-1 ____________
13. This is the tenth cup of coffee that I _____________ (drink) this evening. C-5 ____________
14. Great changes __________ (take) place in Beijing for the past few years. C-2 ____________
15. I felt very tired when I got home, so I _________ (go) straight to bed. B-1 ____________
16. It was the third time that someone ___________ (interrupt) me that night. D-3 ____________
17. By the end of June last year, they ___________ (treat) over 10,000 patients. D-2 ____________
18. Last summer John usually _________ (play) tennis once or twice a week. B-2 ____________
19. I ________ (go) fishing every day when I was in the countryside last year. B-2 ____________
20. I ___________ (learn) English for over ten years, but I still can’t speak it well. C-2 ____________
21. We _____________ (be) in love for eight years and we are getting married next month. C-2 ____________
22. I am not going to the movies with my sister tonight, for I __________ (see) the movie. C-1 ____________
23. The water ______________ (feel) cold when I jumped into the pool for morning exercise. B-1 ____________
24. I ___________ (tell) you five times how to use the computer, but you keep making the same mistakes over and over. C-3 ____________
25. I ___________ (have) enough! He doesn’t know what he wants! He ___________ (change) his mind a dozen times in a few minutes. C-2/3 ____________
26. This book is huge. It has the most extensive collection of World War II photos that I ____________ (see). C-5 ____________
27. The oak tree, which _____________ (stand) in the yard for a hundred years, suddenly crashed to the ground. D-1 ____________
28. A: What ____________ (do) at 10 oclock last night? ____________
B: I _____________ (have) dinner with my friends. A-1 ____________
29. A: How come your father can read books in German?B: Well, he ___________ (work) on a project with some German engineers for 3 years when he was young.B-1 ____________
30. A: Do you have to play that music so loud? I’ve got a test tomorrow!B: Sorry, I __________ (not realize) you were studying. B-3 ____________