51. Somebody in the next room must be ill, a doctor has just come out.

　　A. because B. for C. in that D. as

　　52. To understand the situation completely requires more thought than thus far.

　　A. has given B. was given C. being given D. has been given

　　53. Of great significance the nation-wide movement is the Kampuchean people in their heroic struggle against the aggression of the Vietnamese.

　　A. to support B. for supporting C. supporting D. of supporting

　　54. Many farmers came to the city, jobs and for all the other legendary opportunities of life in the city.

　　A. looking for B. to look for C. having looked for D. looked for

　　55. It is requested that an applicant whose undergraduate work is done at another institution two copies of undergraduate transcripts and degrees directly to the dean of the graduate school.

　　A. must send B. send C. are to send D. need send

　　56. You her in her office last Friday; she’s been out of town for two weeks.

　　A. needn’t have seen B. might have seen C. must have seen D. can’t have seen

　　57. When we arrived, he found the aged and the sick at home.

　　A. none but B. none other than C. nothing but D. no other than

　　58. I hope all the precautions against air pollution, are suggested by the local government, will be seriously considered here.

　　A. as B. while C. after D. since

　　59. Suppose there were a flood or an earthquake and the people could not be reached by trains or trucks. packages of food could be dropped from planes, the people might starve.

　　A. Until B. Before C. Unless D. If only

　　60. Mary has long had the desire a famous writer even though the study of writing would require years of sacrifice on her part.

　　A. for becoming B. to become C. of becoming D. becoming

　　61. This is so difficult a problem that the scientist is known to on it for about ten years, but hasn’t found a solution yet.

　　A. have worked B. have been working C. be working D. work on

　　62. You such a long essay; our teacher only asked for 200 words, and you have written 300!

　　A. mustn’t have written B. couldn’t have written

　　C. needn’t have written D. might not as well have written

　　63. _____ for aches, pains and fever, aspirin is now the subject of multiple investigations of its role in treating many more serious complaints.

　　A. Long used B. Being used long C. Having been long used D. It has long been used

　　64. In no country Britain, it has been said, can one experience four seasons in the course of a single day.

　　A. better than B. more than C. other than D. rather than

　　65. “What do you suggest I write about, then, to stand a chance next year?” “It isn’t so much you write as the way you write it.”

　　A. what…that B. what…which C. what…how D. which…that

　　66. After people have learned that magnets attract things, centuries passed they took note of the fact that magnets sometimes also repel things.

　　A. before B. until C. after D. since

　　67. I walked down the corridor, my footsteps frighteningly through the empty deserted building.

　　A. echoing B. echoed C. to echo D. having echoed

　　68. Beer is the most popular drink among male drinkers ________ overall consumption is significantly higher than that of women.

　　A. that B. what C. which D. whose