-------- a small book store in thistown.( they used to be ,it used to have ,there used to be ,
问题描述:
-------- a small book store in thistown.( they used to be ,it used to have ,there used to be ,
there used to have)
答
There used to be
used to + 动词原形,表示过去常常,这句话的意思是:这个小镇原来有一家书店.(现在没有了.)