Question

Metal ______making machines and many other things.

A．used to

B．is used for

C．is used as

D．is used to

Answer 1

B

试题分析：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
点评：be used to do sth被用来做某事；be used to doing sth习惯于做某事及used to do sth过去常常做某事，是中考必须掌握的基本语言点。其中，used to do sth表示过去常常做某事而现在已经不这样了。