河南成教 / 大学英语
正确率：100%
9、
A pause can make all the _ _ _ _ _ _ _ in the world between an effective speech and an ineffective one in the hands of a master.
A.difference
B.effect
C.impression
D.contribution
A pause can make all the _ _ _ _ _ _ _ in the world between an effective speech and an ineffective one in the hands of a master.
参考答案：
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