Choose the correct option

1. Billy [was|is|were] at the zoo yesterday morning.
2. I [send|sent|am sending] an email to my friend yesterday.
3. Tim [am seeing|see|saw] my sister last week.
4. Martha [don't|didn't|doesn't] watch TV yesterday.
5. When did you [rent|rents|rented] a DVD?
6. [Do they visit|Did they visit|Did they visited] Paris last summer?
7. My parents [go|are going|went] to the theatre last night.