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.

__________ she couldn't understand was__________ fewer and fewer students showed interest in her lessons.
A. What; why    B. That ; what    C. What ; because    D.

题目解答

答案

A

解析

步骤 1：分析句子结构
句子的主语是“she couldn't understand”，后面的部分是主语从句。主语从句中缺少一个引导词，这个引导词需要在从句中充当宾语。
步骤 2：选择合适的引导词
根据句子结构，我们需要一个引导词来充当从句中的宾语，同时这个引导词还需要引导主语从句。在选项中，只有"What"可以同时满足这两个条件。
步骤 3：分析从句中的引导词
从句中“fewer and fewer students showed interest in her lessons”是一个完整的句子，缺少一个引导词来解释原因。在选项中，只有"why"可以引导一个表示原因的从句。