(2013·东城一模)How strange it is the students are so quiet in the classroom!
A. where
B. when
C. whether
D. that
网友回答
A. where
B. when
C. whether
D. that
解析：选D。考查主语从句。句意: 学生在教室里如此安静是多么的奇怪啊!根据句意可知此处为形式主语, 真正主语为the students are so quiet in the classroom并且意思完整, 故用连接词that引导。