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15、The reason why he succeeded is ______ he worked very hard.

A.why               B.that          C.whether                D.how

15、B

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The reason why he succeeded is ______ he worked very hard.

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科目:高中英语 来源: 题型:

The reason why he succeeded is ______ he worked very hard.

A.why               B.that          C.whether                D.how

查看答案和解析>>


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