This is not such a good story _____ I had expected

题目

This is not such a good story _____ I had expected
A.what B.which
C.as D.that
请高手给个确切的答案,再讲下其中的语法知识,

答案

C.as as 为关系代词引到定语从句,并在在从句中做expect 的宾语.该定从修饰先行词story.由于story 被such 修饰（做定语）,根据语法规,只能用as.