1 won't they

2 is she

3 did it

4 wasn't he

5 aren't

6 don't we

7 will they

8 does he

9 isn't she

10 is she
bài 9 
1. isn't it
2. isn't this
3. will you
4 didn't you
5 must you
6 have they
7 don't they
8 isn't he
9 musn't they
10 wont it
11 can't I
12 wont we
13 did you
14 aren't they 
15 shouldn't he
16 wasn't he
17 does she
18 won't he
19 isn't it