题目内容

When he was young, he used to      hard at his lessons.

A.devote to workingB.devote himself to work
C.be devoted to workD.be devoted to working

D

解析试题分析:当他年轻的时候,他常常刻苦的学习功课。Used to do“过去常常”,devote oneself to doing或be devoted to doing致力于做…,所以选D。
考点:考查固定词组

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