----I was riding along the street and all of a sudden, a car cut in and knocked me down.

------You can never be _____careful in the street.

A．much

B．very

C．so

D．too

工作面的形状和规格不取决于（）。

A.电铲的规格

B.作业方式

C.岩石的特性

D.挖掘机的臂架长