题目内容

【题目】________back at my middle school years,I regret not having worked so hard as I should have.

A.Looking

B.To look

C.Looked

D.Look

【答案】A

【解析】look back at意为“回顾,回忆”,与主语I之间是主动关系,因此用动词ing形式作状语。句意为:回顾我的中学时代,我为本应该但没有努力学习而后悔。

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