Erin's hobby is collecting match boxes.She spends a lot of time on it after school.She has been collecting more than fou
问题描述：
Erin's hobby is collecting match boxes.She spends a lot of time on it after school.She has been collecting more than four hundred from different countries.They ____ different in colors and sizes.
A.are both B.are all
答
B.are all
both只能用于两个,all用于三个或以上.我也是这样想的，但是我们老师说是are both 。她说colors和sides是两方面，所以用both。你的老师说错了，如果要表达colors和sides两方面，不是这样表达，而要这样说：They are different in both colors and sizes.看来你的老师有点糊涂了，呵呵。