The man who never tries anything new is a(n) ______ on the wheels of progress.

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问题 The man who never tries anything new is a(n) ______ on the wheels of progress.

选项 A、obstacle
B、brake
C、break
D、block

答案A

解析 obstacle障碍；brake闸，刹车；break破裂，停顿；block阻塞。

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考博英语

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