there were flowers and grass ___ the trees on both sides of the street.

问题描述:

there were flowers and grass ___ the trees on both sides of the street.
A among B between C over D across
选择B的理由是什么呢?

出题人的意思是:“在每两棵树之间”就有花草.“在每两棵树之间”,他认为是最好的参照物.