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题目
题型:不详难度:来源:
Before a problem can be solved, it must be obvious ______the problem itself is.
A.whatB.thatC.whichD.why

答案
A
解析

试题分析:考查主语从句:句意:在问题解决之前,问题本身是什么必须明确。it在句中做形式主语,真正的主语是what the problem itself is ,what在主语从句中做表语,选A。
核心考点
试题【Before a problem can be solved, it must be obvious ______the problem itself is. 】;主要考察你对名词性从句等知识点的理解。[详细]
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