Question

The mixture of his improved self-confidence and never-ending efforts is ________ lies behind his rapid progress in his study.

A. what B. that C. where D. which

Answer 1

A

【解析】

试题分析：考查表语从句引导词。 The mixture of his improved self-confidence and never-ending efforts在句中是主语，空前的is是系动词，所以is后面的应该是表语，于是我们可以判断出这是一个表语从句，结合后半句来看句子缺主语，故选what。故选A。该句意思为：他大大增强的自信心和永不言弃的努力就是他学习快速进步背后的原因。

考点：考查表语从句的使用。