Question

【题目】_____ annoys the teacher most is that all the students are too quiet in class.

A. What B. That

C. When D. Who

Answer 1

【答案】A

【解析】考查主语从句。句意：最让老师恼火的是，所有的学生在课堂上都太安静了。此处是句子做主语，从句缺少引导词，也没有主语，空格处表示“所……的（事）”，故用what，答案为A。