if a train entered this tunnel,it would draw in fresh air behind _其他解答

if a train entered this tunnel,it would draw in fresh air behind it.这里为什么加behind

人气：241 ℃　时间：2020-06-21 18:55:02

解答

如果火车驶进隧道,它后面就会带进新鲜空气来.
在……后面,自然是behind
请及时采纳,多谢!