We can hardly avoid making any mistakes in our work ______ hard we try.

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问题 We can hardly avoid making any mistakes in our work ______ hard we try.

选项 A、whatever
B、how
C、no matter
D、however

答案D

解析 词义辨析。此句为让步状语从句,根据后面的副词hard可以判断,答案只能从B和D选择,however=no matter how,根据句意D更合适。
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