15. could they
16. do you
17. was there
18. need I
19. was it
20. did you
21. will it
22. does she 
23. did it
24. should he
25. could she
26. are you
27. would you
28. had he
29. were they

30. doesn't he

#tienganh           #blingnem           #hoidap

#NOCP

15. They couldn't pay the rent,could they?

16. You don't agree with Bill,do you?

17. There wasn't a lot to do,was there?

18. I needn't say anything,need I?

19. That wasn't Ann on the phone,was it?

20. You didn't do it on purpose,did you?

21. This won't take long,will this?

22. She doesn't believe you,does she?

23. It didn't matter very much,did it?

24. Mary couldn't leave the children alone,could she?

25. You aren't doing anything tonight,are you?

26. You wouldn't mind helping me with this,would you?

27. George hadn't been there before,had she?

28. The children weren't surprised,were they?

29. You wouldn't like another drink,would you?

30. Tom doesn't have to go to lectures,does she ?