A
1)I must
2)i musn't
3)must
4)must
5)must
6)must
7)must
8)musn't
9)must
B
1)have to
2)has to
3)have to
4)don't have to be
5)have to
6)don't have to
7)have to
C
1)musn't
2)must
3)musn't
4)musn't
5)must
6)must
7)musn't
8)musn't
9)must
10)must
11)must
12)must
13)must
14)must
15)musn't
D
1)I must go home and have a rest.
2)I musn't get up early
3)We must be quiet
4)I must to be careful
5)She must finish it in time.
6)We must obey the rules.
7)So,i must stay at home.
8)I musn't buy another one.
9)I must do housework and cook
10)musn't bully on friends.
11)You must do the exercies.