21. In ______ recent years, Niagara Falls have come to be appreciated more for their natural beauty as _______ wonder of nature.

　　A. the; a

　　B. the; the

　　C. /; the

　　D. /; a

　　22. ________ such circumstances, one can only fight back.

　　A. Below

　　B. Within

　　C. Over

　　D. Under

　　23. By the end of next month he ________ everything in school.

　　A. will finish

　　B. would finished

　　C. finishes

　　D. will have finished

　　24. I heard that he _________ great progress in his research since we last parted.

　　A. had made

　　B. made

　　C. has made

　　D. makes

　　25. Why do you worry so much _______ your health? I think you are all right.

　　A. for

　　B. about

　　C. at

　　D. on

　　26. I need one more stamp before my collection ________.

　　A. is completed

　　B. completed

　　C. has been completed

　　D. has completed

　　27. Dave ________ into the house without ________ out by his parents.

　　A. slipped; finding

　　B. slips; finding

　　C. slips; to be found

　　D. slipped; being found

　　28. What is the reason for _______ on time?

　　A. not your coming

　　B. you not come

　　C. your not coming

　　D. you not to come

　　29. Our English teacher demanded that we _______ to English broadcast every day.

　　A. listening

　　B. would listen

　　C. listen

　　D. could listen

　　30. Was it until the1990s _______ the old man finally got a house of his own?

　　A. when

　　B. that

　　C. which

　　D. how

　　31. Sally has failed again. I think she _____ harder.

　　A. ought have studied

　　B. ought to have studied

　　C. must have studied

　　D. may have studied

　　32. ” I don’t drink coffee at all. “ “ __________.”

　　A. So don’t I

　　B. I do either

　　C. Nor I do

　　D. Neither do I

　　33. It’s not my fault. I have ______ the matter .

　　A. nothing to do with

　　B. something to do with

　　C. anything to do with

　　D. everything to do with

　　34. Michael used to look hurt and surprised when _________.

　　A. criticizing

　　B. to criticize

　　C. having criticized

　　D. criticized

　　35. We started out early in order that we _________ there in time.

　　A. would get

　　B. ought get

　　C. should get

　　D. had to get

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