why都能引导什么样的从句？
why引导的从句主要有：
A. 主语从句
Why he took Swiss nationality in1901 is a question that interests us. 他为什么在1901年取得瑞士国籍,这是一个使我们很感兴趣的问题。
B. 宾语从句 He asked him why he was doing that. 他问他为什么要那样做。
That is why he loved her more than us. (Dan Brown, The Da Vinci Code) 那也是他爱她胜过爱我们的原因。(《达·芬奇密码》)
D. 状语从句
No matter why she became angry with you, you should apologize to her. (SEFC, 3A, p. 95) 不管她为什么对你生气，你也应当向她道歉。
E. 定语从句, 见 appositive clause or attributive clause
I think I know part of the reason why your grandfather conspired to put us together. (Dan Brown, The Da Vinci Code) 我想我知道你祖父为什么要千方百计将我们拉到一块儿的部分原因了。(《达·芬奇密码》)
请做下面的英语试题：
____ she couldn't understand was ____ fewer and fewer students showed interest in her lessons. A. What ... why B. That ... what C. What ... because D. Why ... that(上海高考,00-27)