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The question is it is worth doing.A.ifB.whetherC.whichD.what

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The question is it is worth doing.A.ifB.whetherC.whichD.what

The question is ________ it is worth doing.

A.if

B.whether

C.which

D.what

试题答案

B

解析:

whether在这里引导一个表语从句.