C) to estimate the length of cable that was needed
D) to measure the depths of the two oceans
24. Defied in the 5th paragraph probably means ______.
A) doubted C) challenged
B) gave proof to D) agreed to
25. This passage is mainly about ______.
A) the beginnings of oceanography
B) the laying of the first undersea cable
C) the investigation of ocean depths
D) the early intercontinental communications
Passage Two
Questions 26 to 30 are based on the following passage:
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.
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