We planted trees and flowers on ___sides of the new road and made it ________.
问题描述：
We planted trees and flowers on ___sides of the new road and made it ________.
A all ;beautiful B both;beautiful C every ;beautifully D each;beautifully
答
B
首先排除CD,因为两个都表示每个,后跟单数名词,但是sides为复数,所以不符合
both和all 的区别是,all是三者及三者以上的都,both是两者都,路有两边,所以用both