Regarding "question tags"
Could you revise pls...
1.We are writing a test right now, aren't we?
2.We are writing a test right now, arent we?
3.I like to help my friends, do I?
4.Open the door, will you?
5.We have already decided where to go, haven't we?
6.I'm not a doctor, am i?
7.They don't like to go to the disco, are they? (or do they?)