Answer:
Here is my sentence.
1. The boy fell on the stairs BECAUSE he wasn't watching his steps
2. Do you want candy OR ice cream?
3. I wish I could have a dog SO that I cannot be lonely when my parents leave
4. You cannot go out UNLESS you finish your activity!
5. Neither my friends NOR the bookstore has the book
6. I wanted to go out BUT my parents won't allow me
7. I have an ALT account in my game
