The students should be encouraged to read such books__good for them in forming good habits.

题目

The students should be encouraged to read such books__good for them in forming good habits.
A.that are B.as they are C.as are D.that they are

答案

C.as are
as 引导定语从句,并在从句中做主语,是关系代词.又因为有such as 的结构所以选C