曼谷航空托运行李规定:What differences do these two sentences have?句子里为什么加do?

翻译：What similarities and differences do you know about...? What differences do these two sentences have?句子里为什么加do? What differences do you see in education between the east and the west?我们英语考试的题目，急啊！！ what do you do what differences between another and other? what do you do 是什么意思? what do doctors do?是什么意思? what do you do ???是什么意思? 许慧欣 what do i do I --------- do what I what .