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` 29. C `

` @ D//C: ` 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.  

` => ` 1 khóa học có ` 3 ` lớp ` // ` tuần

` => ` có ` 4 - 5 ` hóa học ` // ` kỳ mà ` 1 ` ng phải dự

` => 1 `  sinh viên phải tham dự từ: ` 3 xx (4 - 5) = 12 - 15 ` lớp

` => 1 `  sinh viên ít nhất phải tham dự `12` lớp học.

` 30. B `

` @ D//C: ` 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.

` 31. A `

` @ D//C: ` 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 employers. 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.

` 32. C `

` @ D//C: ` 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.

` 33. B `

` @ D//C: ` The effective work of maintaining discipline is usually performed by students who advise the academic authorities.