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    【题目】_____the teacher couldn’t understand was _____ fewer and fewer students showed interest in his class.

    A. What; that B. All that; because

    C. Why; that D. What; why

    【答案】A

    【解析】

    试题分析：考查名词性从句； 根据句子结构可知，第一空为主语从句，从句中缺少understand的宾语，第二空为表语从句，从句中缺少原因状语。句意为，她无法理解的是，为什么越来越少的学生对她的课感兴趣 ，故选A项。

    考点 : 考查名词性从句

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