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　　Part Ⅴ GRAMMAR AND VOCABULARY ［15 MIN.］ (来源：英语学习门户 http://www.EnglishCN.com)

　　There are twenty-five sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentence.? Mark your answers on your answer sheet.??

　　41.  Acute hearing helps most animals sense the approach of thunderstorm s long before people___.?

　　A. do     B. hear       C. do them     D. hearing it ?

　　42. This is an illness that can result in total blindness ___ left u ntreated.?

　　A. after   B. if C. since D.unless ?

　　43.  The central provinces have floods in some years, and ___.?

　　A. drought in others   B. droughts are others? C. while other droughts D. others in drought ?

　　44.  Do help yourself to some fruit,___ you??

　　A. can't B. don't C. wouldn't  D. won't ?

　　45.  There___ nothing more for discussion, the meeting came to an e nd half an hour earlier.?

　　A. to be      B. to have been    C. being   D. be

　　46.  My mother can't get ___ because she has rheumatism (风湿病). ?

　　A. about     B.on     C. through     D. in

　　47. I was very much put ___ by Mark's rude behavior; it really annoy ed me.?

　　A.over    B.off C.up     D.by ?

　　48.  You ___ Jim anything about it. It was none of his business.?

　　A. needn't have told        B. needn't tell   ? C. mustn't have told        D. mustn't tell ?

　　49.  All of us would have enjoyed the party much more if there___ q uite such a crowd of people there.?

　　A. weren't  B. hasn't been   C. hadn't been    D. w ouldn't be ?

　　50. Firms that use computers have found that the number of staff ___ quality control can be substantially reduced.?

　　A.whose   B.as  C.what    D.that ?

　　51. ___ at in this way, the present economic situation doesn't seem so gloomy.?

　　A. Looking    B. Looked   C. Having looked   D. To look ?

　　52. Many people are ___ to insect bites, and some even have to go to hospital.?

　　A. insensitive    B. allergic     C. sensible    D. infected ?

　　53.  When you're driving on a motorway, you must obey the signs telling you to get into the right ___.?

　　A.way B.track   C.road    D.lane ?

　　54.  The motorist had to ___to avoid knocking the old woman down in the middle of the road.?

　　A. swerve  B. twist   C. depart  D. swing ?

　　55.  In winter drivers have trouble stopping their cars from ___ on icy roads.?

　　A. skating  B. skidding C. sliding  D. slipping ?

　　56.  This project would ___ a huge increase in defense spending.?

　　A. result  B. assure  C. entail  D. accomplish ?

　　57.  The chances of a repetition of these unfortunate events are ___ indeed.?

　　A. distant  B. slim   C. unlikely D. narrow ?

　　58.  We should make a clear ___ between 'competent' and 'proficient' for the purposes of our discussion.?

　　A. separation   B. division C. distinction   D. diffe rence ?

　　59.  In the present economic ___ we can make even greater progress than previously.?

　　A. air    B. mood   C. area   D. climate ?