________ harder, he would have succeeded in the college entrance examinationA．He_刷题宝

题干

________ harder, he would have succeeded in the college entrance examination

A．He worked

B．He had worked

C．Had he worked

D．Did he work

上一题下一题 0.85难度单项选择更新时间:2010-07-21 07:33:01

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