29. Mary 　　　his letter; otherwise she would have replied before now.　　　　　　　　　　　　　　　　　　　　　　 　A. has received　　 　　　 　　　　　 B. must receive 　C. couldn't have received 　 　　　　　 D. shouldn't have received

28. Her eyes were red. She 　　.　 　　　　　　　　 　 　A. must cry 　　　　　　　　　　　　　　 B. must be cried 　C. must have been crying 　 　　　　　 D. may cry

27. -Must we finish the composition in class?

-No, you 　　　.　 　　　　　　　　　　　　 　A. needn't 　 　 B. mustn't　　　　　　　 C. won't 　 　　　　　　 D. shouldn't

26. You 　　　lead a horse to the water but you 　　　　not make it drink. 　　　　　　　　　　　　　　　　　　　　 　A. will…can 　　 B. may…can　　　　　 C. may…dare 　 　　　　 D. dare…can

25. 　　　it be true that Albert passed the test in geography?　　 　A. May　　　　 B. Should　 　　 C. Could　 　　　　　　　 D. Would

24. He did not pass the examination. As a good student, he　　 .　 　A. mustn't have failed　 　　　　　　　　 B. may not have failed 　C. needn't have failed　 　　　　　　　　 D. shouldn't have failed

23. He 　　　the work yesterday, but he didn't.　　　　　　　 　A. must have finished　 　　　　　　　　 B. need have finished 　C. finished　　　 　　　　　　　　　　 D. should have finished

22. I parked my car right here but now it's gone. It 　　　.　　 　A. must be stolen　 　 　　　　　　　　 B. may be stolen 　C. must have stolen 　 　　　　　　　　　 D. must have been stolen

21. Everyone is here. 　　　　we start the meeting?　　　　　 　A. Can　 　　　 B. Must　 　　　　 C. Should　 　　　　　　 D. Shall

20. Tom ought not to 　　　　me your secret, but he meant no harm. 　A. have told 　　 B. tell　　　　　　　　　 C. be telling 　 　　　　　 C. having told