we used____to school on foot,but now we____by bus a.to go ,go b.going ,goc.to go,going d.going,going
问题描述：
we used____to school on foot,but now we____by bus a.to go ,go b.going ,go
c.to go,going
d.going,going
答
we used____to school on foot,but now we____by bus a.to go ,go b.going ,go 、 c.to go,going d.going,going 选择a,因为used to do表示过去常常做某事,now 表示一般现在时,主语为we,所以后面go的形式为动词原形.