we must be careful on our way_________(to school,school)为什么选

we must be careful on our way_________(to school,school)为什么选择to school呢?
2还有The question is ________________?
A.what time to go there B.when go there
为什么选择A,B怎么不对尼
3.There are losts of trees and flowers on ________both side of the roads in Guangzhou.
A.both B.either
但是A怎么不对尼?翻译的话是：在广州的路两边都有很多树和花.为什么不选择both,两个词语怎么分尼?

1.你一定是受了way home way 的影响,home的home是副词,但school没有副词形式,所以其它时候没有副词形式的,只能way to sth 2.what,when,how,where这样四个词后面加to do或to do sth就可以构成名词性质的短语充当主语或宾语,但省掉to 就不可以 3.因为后面是side所以选either,如果是sides选both,第一种情况即either side直译是任一边,意译是两边