start at once,or you will be late for...改写

问题描述:

start at once,or you will be late for...改写
———————— start at once,you will be latefor...

Start at once,or you will be late for ...(改写)
(Unless you) start at once,you will be late for ...
除非你马上开始,不然就晚了.
unless,除非,相当于if not.if dont 可以吗这样的话,要填3个词 If you don't(主语you不能缺),不符合题目要求。