There ___ a lot of sheep in the hill.A.used to be B.use to be C.using to be D.will use to
问题描述：
There ___ a lot of sheep in the hill.A.used to be B.use to be C.using to be D.will use to
答
A
used to do sth 过去常常做某事
意思：山上过去有很多绵羊.