Exercise A
1)
HAVE
TO / DON’T HAVE TO
2)
DON’T
HAVE TO / MUSTN’T
3)
MUSTN’T
/ DON’T HAVE TO
4)
HAVE
TO / HAVE TO
Exercise B
1 You don’t
have to
2 You mustn’t
3 don’t
have to
4 mustn’t
5 mustn’t
6 don’t
have to
7 mustn’t
8 don’t
have to
9 don’t
have to
10 mustn’t
Exercise C
(1)
has
(2)
Does
she
(3)
Have
to
(4)
She
has
(5)
Must
(6)
Does
she
(7)
Mustn’t
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