1 What is the first thing you do when you backhome?
2 The first thing he does when he back home is turning on the computer.
3 What is the first thing you do when you go to/after work ?
4 The first thing he does when hegoes to/after work is cleaning the office.
5 What is the first thing you do when you come to the office?
6 The first thing he does when he come to the office is putting the mobilephone on the table.谢谢帮忙哈。。第一句What is the first thing you do when you backhome?从句 when you back home ，从句缺少动词吧。不小心打掉了吧？come back home 会好很多哦。(*^__^*)呵呵~~对的~~