Let's start at once,or we'll be late for the meeting

Let's start at once,or we'll be late for the meeting i ＿to leave at once ,or i'll be late for the meeting a .tell Leave at once,or you'll be late for the meeting. Let‘s go at once,()we'll be late. Let’s hurry,or we will be late for the meeting.(同义句) ______w start at once,or you will be late for...改写 Hurry up,or you'll be late for the meeting. 改复合句：Let's hurry ,or we'll be late 改写Unless you start at once,you’ll be late. Let's walk quickly,or we'll be late for school.（改为含有条件状语从句的复 Let‘s walk quickly ,or we'll be late for school(改为含有条件状语的句子） Jim!Let's go to school at once .We'll late.