大学英语四期末考试单选题库(14)

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reater is the likelihood of
C. the likelihood is greater D. the likelihood the greater
参考答案:the greater is the likelihood of
109. We have been told that under no circumstances __________ the telephone in the office for personal affairs.
A. did we use B. may we use C. we may use D. we could use
参考答案:may we use
110. It is suggested that supermarkets be established in every district __________ 50,000 residents or more.
A. having B. to have had C. to have D. having had
参考答案:having
Unit5
1. Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit which he may count towards a degree. In many American universities the total work for a degree consists of thirty-six courses each lasting for one semester. A typical course consists of three classes per week for fifteen weeks. While attending a university a student will probably attend four or five courses during each semester. Normally a student would expect to take four years attending two semesters each year. It is possible to spread the period of work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice.
For every course that he follows a student is given a grade, which is recorded, and the record is available for the student to show to prospective employer. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs. Elections to positions in student organizations arouse much enthusiasm. The effective work of maintaining discipline is usually performed by students who advise the academic authorities. Any student who is thought to have broken the rules, for example, by cheating, has to appear before a student court. With the enormous numbers of students, the operation of the system does involve a certain amount of activity. A student who has held one of these positions of authority is much respected and it will be of benefit to him later in his career.


2． It is autumn in Alaska. The snows have already begun. In the treeless grazing lands of the north, the caribou are moving south. These New World relatives of the reindeer make long journeys south every year when winter approaches.
The cold does not bother them because of their thick coats. Neither does the snow. The name caribou comes from an Indian word meaning "pawing," and that is what the caribou do to get their food. They paw away the snow to find moss and grass underneath. But they cannot paw through the ice that will soon cover the ground. And so they must move south.
Caribou are expert travelers in the snow. They move in sin
gle file, each animal stepping in the tracks of the one before it. Eventually, after traveling hundreds of miles, they reach the edge of the gre

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