题目内容：

In my opinion, the idea of a family is much narrower than ___. A. that used to be B. it used to
C. it was used to D. it used to be .请问,为什么不选A?

优质解答

be use to是习惯的意思吧?还有更多……
used to do 表示过去常常做某事,而现在往往不做了
be used to doing 表示习惯于做某事
be used to do表示...被用来做某事
上面句子的含义是：
照我个人观点,family的含义较以往来说窄多了!故用use to be