————，it is dangerous to look out of windows when are on the train.

来源：百度知道 编辑：UC知道 时间：2024/06/21 19:00:37
有3个选项
A.Look up B.Look out C.Look after

选B
因为look up有查询，抬头看等意思，可以说look up the dictionary
而look after 是照顾照料的意思，look after the child
look out 有当心，小心的意思，所以选、B

B
look out是当心的意思
look up是抬头看或查询的意思
look after则是照顾的意思