18. ___________ a fairly long speech in a play is often presented as a recitative in the Taiwanese opera.
(A) That it is
(B) There would be
(C) When there is
(D) What would be

 What would be a fairly long speech in a play is often presented as a recitative in the Taiwanese opera. 表現在歌仔戲一個宣敘調往往是相當長的一段話在一齣戲裡。

What would be a fairly long speech in a play (這裡為止是一個由what所引導的名詞子句,what本身在名詞子句中當would be的主詞,所引導出的子句當後面is的動詞) is often presented . . . .

that 可以引導名詞子句,但是它跟what的差別在於他不能當名詞子句內的主詞(也就是句中would be的主詞)

there 跟 it 根本就不能引導子句,所以不用看,這題要選 (D) what

這一題它改的不好，是2005年的題目改的。 原題是

( )_____ would be a fairly long speech in a play is often presented as a recitative in opera. 
A.That B.There C.It D.What