Verified answer

1. Wendy is good at playing the piano, isn't she?
2. Sharon has got a lot of toys in her room, hasn't she?
3. Mr. Brown walks to work every morning, doesn't he?
4. You haven't sent those letters I gave you, have you?
5. He can write the summary of this fairy tale, can't he?
6. The blue whales are the biggest animals on earth, aren't they?
7. I'm not your best friend at school anymore, am I?