21. He has already finished his homework.(改为否定句)

He _________ finished his homework _________.

20. You like listening to soft music.

You like listening to soft music, _________ _________?

19. She isn’t the best one in the class.

She isn’t the best one in the class, _________ _________?

18. Everything goes well.

Everything goes well, _________ _________?

17. Let’s ask our teacher for help.

Let’s ask our teacher for help, _________ _________?

16. I don’t think you can answer this question.

I don’t think you can answer this question, _________ _________?

15. Don’t look out of the window.

Don’t look out of the window, _________ _________?

14. Peter could hardly see the words on the blackboard.

Peter could hardly see the words on the blackboard, _________ _________?

13. There’re more than ten pandas on the hill.

There’re more than ten pandas on the hill, _________ _________?

12. You came here together.

You came here together, _________ _________?