20. I should have been there, but I_____ not find the time.

A would　　　　 B could　　　　　 C might　　　　　 D should

19. Mr. Bush is on time for everything. How ______it be that he was late for the opening ceremony ?

　 A can　　 B　 should　　 C may　　 D　 must

18. ---There was a lot of fun at yesterday’s party.

---You ____come, but why didn’t you?

　 A must have.　 B should.　 C need have.　　 D ought to have

17. ---- Jason had a car accident.

　 ---- He ________ have drunk and driven.

　 A. mustn’t　　 B. wouldn’t　　 C. shouldn’t　　 D. couldn’t

16. The kid is very shy; he _________ say what is really in his mind.

　A. dares not　　 B. doesn’t dare　　 C. dare not to　　 D. dare do not

15. You must be a poet, ________ you?

　A. are　　 B. aren’t　　 C. must　　 D. mustn’t.

14. _______ the yard, I found it ________ with lots of ________ leaves.

　A. Entering; covering; falling　　 B. Entering; covered; fallen

　C. Entering; covering; fallen　　 D. Having entered; covered; falling

13. The old photo _________ my memories of the days when we worked together.

　A. called up　　 B. called in　　 C. called back　　 D. called for

12. The temperature can fall to -30oC, ______ is, 30oC below freezing point.

　A. which　　 B. it　　 C. this　　 D. that

11. Density of water _________ kilograms per cubic meter.

　A. measures　　 B. is measured　　 C. measures in　　 D. is measured in