你好,很高兴能够在这里回答你的问题,这道题的正确答案应该为：
We have to leave the cellphones at home on shcool days.
Do you have to leave the cellphones at home on shcool days?
Yes ,we do.
上面已经改为一般疑问句了,这里应该是改为特殊疑问句了吧
When do you have to leave the cellphones at home ?
老师说电话要用mobile什么什么的。能不能告诉有关mobile的电话英语单词？手机mobile phonecell phone 都可以的既然你老师有要求，换为 mobile phone就可以了手机mobile phonecell phone 都可以的既然你老师有要求，换为 mobile phone就可以了谢谢了。能不能改个否定句We don't have to leave the cellphones at home on shcool daysok谢谢你就采纳你吧祝你进步