_________ that he had fallen behind,he tried to work harder.A.Having realizedB.RealizedC.RealizeD.To

题目简介

_________ that he had fallen behind,he tried to work harder.A.Having realizedB.RealizedC.RealizeD.To

题目详情

_________ that he had fallen behind,he tried to work harder.
A.Having realizedB.RealizedC.RealizeD.To realize
题型:单选题难度:偏易来源:不详

答案

A 
分词的完成式作状语,强调动作在句子的动作前发生。

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