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...
答
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。