This is certainly the case, but ____ it is a mistake or not I don’t know. A.ifB.even thoughC.whether

题目简介

This is certainly the case, but ____ it is a mistake or not I don’t know. A.ifB.even thoughC.whether

题目详情

This is certainly the case, but ____ it is a mistake or not I don’t know.
A.ifB.even thoughC.whetherD.that
题型:单选题难度:偏易来源:不详

答案

C                       
引导宾语从句时,whether 和if常可互换,但如从句提前,则只能用whether。  

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