Thereasonhehasmadesuchgreatpr

发布时间：2020-07-27 23:39:45

The reason he has made such great progress is ________ he has never wasted his time.A.becauseB.whyC.thatD.what

网友回答

C解析reason作主语时，后面的表语从句用that，而不能用because．
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