【题目】Didn’t it occur to you ________ we could have solved the problem in an easier way?
A. thatB. whetherC. how D. why
在线课程【答案】A
【解析】
试题分析：考查主语从句。句意：难道你没有想到我们可能已经用更简单的办法解决了这个问题吗？这是一个主语从句，it代替后面的句子作了形式主语，根据句意，从句叙述的是事实，而且不缺少任何成分，所以关系词选用that，故A正确。
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