they are flowers and trees on__side of this road

问题描述:

they are flowers and trees on__side of this road
A every B both C either D all
两本书的答案居然不一样.
不晓得到底选那个,
是there are flowers and trees on__side of this road 打错了

选 C 路只有两边,选 B 的话,side 要用复数
A 和 D 表示的不止两,有多