I had been puzzled over the problem for over an hour without any result, al - 高中英语试题 - 超级试练试题库

题目

题型：不详难度：来源：

I had been puzzled over the problem for over an hour without any result, all at once a solution flashed across my mind.

A．while	B．when
C．then	D．as

答案

解析

考查连词的用法。while当什么的时候，when正在那时，then那时，as意为，当什么的时候，句意：对这个问题我已经困惑了一个多小时了没有任何的结果，突然正在那时一个解决方案在我脑海闪现。故选B。

核心考点

试题【I had been puzzled over the problem for over an hour without any result, al】；主要考察你对连词等知识点的理解。[详细]

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