单选题
American university students are usually under pressure of work because ______.
A、
their academic performance will affect their future careers
B、
they are heavily involved in student affairs
C、
they have to observe university discipline
D、
they want to run for positions of authority
【正确答案】
A
【答案解析】
根据文章第二段第一句和第二句，学生之所以处于紧张、有压力的学习状态之中，是因为每修一门课的成绩都影响他们将来的就业，A正确。
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