on ( ) side of the river there are a lot of tress.either,neither,both,all.为什么选a?
问题描述：
on ( ) side of the river there are a lot of tress.either,neither,both,all.为什么选a?
答
neither表示否定,“两者都不”
both 后面应该用复数,“both sides”
all 表示三者或三者以上