Metal making machines and many other things.A. used toB. is used forC. is used asD. is use

问题补充：

Metal making machines and many other things.

A. used to

B. is used for

C. is used as

D. is used to

答案：

A. used to

(答案→)B. is used for

C. is used as

D. is used to

解析：句意：金属常用语制造机器和许多别的东西。is used for doing sth= is used to do sth 被用来做某事，故选B