根据网考网考试中心的统计分析,以下试题在2019/8/14日专升本考试习题练习中,答错率较高,为:53%
【单选题】 Economies, several courses of which I have taken thus far, ______ to be difficult but useful for almost all students.
A.prove
B.proves
C.have been proved
D.are proved
网考网参考答案:B,答错率:53%
网考网试题解析:
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