There are many tall trees on---side of the street.A.both B.a

错了,不是A 是
C.either
on___side
这是单数的.
在任何一边,都有许多树.
You may sit on either side of the table.
你可以坐在桌子两边的任一边.
Sit on either side.
随便坐哪一边.
The tall,dark,spear pines sentineled the shores on either side.
两岸排着一行行挺拔的,黑黑的,剑戟似的松树.
A.both
街道只有两个边.