Choose the underlined part among A, B, C or D that needs correcting

C. Choose the underlined part among A, B, C or D that needs correcting.
6.They enjoy watching soccer on television, do they?
A enjoy
B soccer
C television
D do they
7. David and Peter love football but their classmates don’t, do they?
A and
B love
C but
D do they
8. I’ll help you with your homework, shan’t I?
A I'II
B you
C your homework
D shan't I
9. There are ten children playing in the yard near her house, aren’t they?
A There
B Children
C Playing
D Aren't they
10. Smoking isn’t good for our health, so it should be banned, is he?
A Smoking
B for our health
C Be
D is he