题目

_________she couldn't understand was_______fewer and fewer students showed interest in her lessons. A. What; why    B. That ; what    C. What ; because    D.What;what 答案：A 解析: 本题是主语从句和宾语从句的共同考查。what引导主语从句，同时充当understand的宾语。why引导定语从句。

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