An opinion is someone believes is true but has not been proved.A. that B. what C. which D. whether

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【题目】An opinion is _____ someone believes is true but has not been proved.

A. that B. what

C. which D. whether

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【答案】B

【解析】

试题分析：what someone believes is true做is的表语从句，what指的是an opinion。句意：一个观点是一些人认为是正确的但是还没有经过证实的那个。故选B。