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    精英家教网 > 高中英语 > 题目详情
    —You may find the key to the math problem on page 107．
    —Ah, it's so simple． I wonder why I _       of that．
    A．hadn't thoughtB．haven't thought
    C．didn't thinkD．wasn't thinking
    C

    试题分析：考查时态：句意：--你可以在107页找到数学问题的答案。--哦，是这么简单，我当时没想到这句应该用过去式，A表示过去的过去B表示到现在没想到，D是过去没有在想。选C。
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