Before we cross the road,we must stop and look both ways?loo

我们过马路之前要停下来看看两边.
look 后接名词时要加 at,如：look at your own book.但此处look 后接的both ways 用作方位副词,表示动作的方位,目的地.如can you look inside the house?just look around and u'll find many cars.