some buildings along the street to keep the city tidy A pulled down B was pulled down C were
问题描述：
some buildings along the street to keep the city tidy A pulled down B was pulled down C were
pulling down D were pulled down 选什么
在street 和to 的中间
答
选 D
首先,some buildings ,主语,复数,而且是被动,所以选D
some buildings along the street were pulled down to keep the city tidy
为了保持城市整洁,一些街道上的建筑被拆除.