You may use __ of the two bottles to water the trees on __ side of that street.a.every;each b.each;
问题描述：
You may use __ of the two bottles to water the trees on __ side of that street.a.every;each b.each;
every c.either;both d.either;either 选哪个合适,为什么这样选,
答
看来只能选d了.every是指三个或三个以上的每一个,each指两个或两个以上中的每一个,either指两个中的任一个,这句话里面已经说了共有两个瓶子,而且是you may use,你可以用,所以前面只能选either,；后面的side没加s,所以用either,如果加了s,可以用both.综合起来看,选D选项