大学英语四期末考试单选题库(15)

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at forest of the north. There they will spend the winter.
When spring comes, the caribou must return north. This spring migration is the most pressing journey. Female caribou need to get back to the home range to have their calves. When the journey begins, lakes and streams are still frozen. Storms still rage. After a long winter, the caribou are like scarecrows from months of very limited food. Why do they begin to migrate in mid-March? No one knows for sure. The increasing daylight may have something to do with it.
The greatest danger on the journey north is from wolves. They attack caribou at the head and neck, not about the legs as many people believe. A pack of five or ten hungry wolves will often completely devour a caribou in two days.
In the summer the caribou are pestered by mosquitoes. They often run about seeking escape from the insects. It is the end of summer or the beginning of fall before they really can begin to fatten up. During this period they also grow a fine coat and a new set of antlers. They are then ready to breed and to start on south to their winter home in the forest.
In 1960 : ABCBD
In some ways : CADBB
Normally : ACCBD
It is autumn : ADBAD
61. The public transit employees were on strike __________ higher pay and better working conditions.
A. requiring B. persisting C. inquiring D. insisting
参考答案:requiring
62. Last week the union leaders and employers had a __________ meeting and reached no workable agreement.
A. chill B. fruitful C. cheerful D. candid
参考答案:chill
63. She's very __________ with her time -- always ready to help others.
A. incredible B. prudent C. generous D. modest
参考答案:generous
64. The future of this business company is __________, as it has very little money. You'd better not go.
A. definite B. uncertain C. promising D. inspiring
参考答案:uncertain
65. The loss of fortune in business overnight is beyond human __________, but he managed to get through.
A. coincidence B. endurance C. instance D. significance
参考答案:endurance
66. According to scientific research, the working of this machine __________ to that of the human brain.
A. stick B. turn C. corresponds D. contributes
参考答案:corresponds
67. As they were __________ of the swift change of the world stock market, the paper value of their shares shrank rapidly.
A. adequate B. ignorant C. negative D. instinctive
参考答案:ignorant
68. The agreement is not __________, because one of the people who signed it is not lawfully old enough to do so.
A. effective B. valid C. feasible D. deceptive
参考答案:valid
69. Often, though, human greetings still serve to __________ the relative social status of the individuals concerned, particularly on formal occa
sions.
A. commit B. suspect C. clarify D. execute
参考答案:clarify
70. After the concert, hundreds of wine bottles and beer cans were ___

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