The students are encouraged to read such books ____ good for them in forming good habits.

问题描述:

The students are 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
为什么?

such as 是固定搭配!be good for 也是固定搭配,意思是对.有益处!