No one knows exactly ______ this important discovery was made.A．that　　　B．that ho - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

No one knows exactly ______ this important discovery was made.

A．that　　　

B．that how 　　

C．what 　　

D．when

答案

解析

考查名词性从句。when什么时候，句意：没有人确切的知道什么时候发现这个重要的发现。

核心考点

试题【No one knows exactly ______ this important discovery was made.A．that　　　B．that ho】；主要考察你对连词等知识点的理解。[详细]

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