9. will they

Excircise 1:
9.will they; 10.do they; 11.wasn't they; 12.does he; 13.won't she; 14.isn't it; 15.weren't you; 16.did they; 17.isn't it; 18.has he; 19.haven't we; 20.couldn't she
Excircise 2:
1.a; 2.b; 3.b; 4.a; 5.b; 6.b; 7.a; 8.b; 9.b; 10.a (a là bên trái, b là bên phải nhìn từ phía trên xuống)

9,will they
10. do they
11 wasn't he
12. does he
13. won't he
14. isn't it
15 weren't you
16. did they
17, isn't it
18. has he
19. haven't we
20. couldn't he