Complete the sentences with the correct form of much or do.
1)I ... a lot of phone calls to my family while I was away.
2)Have you ... your homework yet?
3)Do you ... a lot of sport?
4)I called the doctor to ... an appointment.
5)I think they need to ... some changes.
6)Sometimes, people ... fun of his voice.
7)Are we going to ... the same thing next week?