It was until dark ___ he found ___ he thought was the correct way to solve the p

题干

It was until dark ___ he found ___ he thought was the correct way to solve the problem.

A．that; what

B．that; that

C．when; what

D．when; that

上一题下一题 0.64难度单项选择更新时间:2013-06-25 06:08:36

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