—Li An can always ________ some special ways to make his movies win prizes in the world.

—Yea. He is an unusual and creative director. 

A． look up

B．turn up

C．come up with

D．give up

对于单跨隧道浅埋暗挖方法，当开挖宽12～16m时，应选择（）。

A.台阶开挖法

B.CD法

C.CRD法

D.PBA法

E.双侧壁导坑法