工具、夹具、量具应（）。以方便使用。
A.可以堆放
B.任意堆放
C.摆放整齐
D.无所谓
参考答案：C
33. Nowadays, use____of certain waste materials to protect the environment.
A．is making
B．will make
C．is being made
D．will be made
The girl sat in the corner quietly none of us noticed she was there.
A．such; that
B．too; to
C．so; that
D．very; that
