1,Helen came from the UK and she's living in Nanjing .2.Wang Bing got off the bus at the first stop.3.My house is about two kilometres away from our school .4.Xiao Hong is asking how to get there.2应该是get off吧应该用过去式got，如果现在时，则是gets off为什么要用过去式因为 原文用的是过去式。