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问题: 用use的适当形式填空。

He isn't what he ( ) to be.Now he( ) to rising early. He says that he wants to make ( ) of his time,doing something( ) hor society.

解答:

used,这里是固定搭配:used to do 过去是。。。。
is used ,Be used to doing sth ,习惯做。。。
use,固定搭配make use of,充分利用。。
useful,这里是考use的形容词。意为‘做对社会有用的事’。