Question

【题目】Many students are at a loss as to _________ they spend so much time on language learning, but achieve little.

A. that B. why C. how D. which

Answer 1

【答案】

【解析】

试题分析：考查名词性从句。句意：很多学生感到困惑的是为什么他们在语言学习上花费了如此多的时间但收效甚微。分析句子结构可知，空处在此引导从句作as to 的宾语，且引导词在从句中充当原因状语，故用why。故选B项。