1.I must do my homework everyday.
2.I must go to school.
3.I must go to bed at 10 p.m.
4.I must learn
5.I must run everyday
6.I must clean my room
7.I must help my mother
8.I must help my father
9.You must do your homework
10.She must buy a present for her mother.
11.You must buy a teddy bear for your brother,
12.He must leave home at 12 a.m
13.I must buy anything for a friend.
14.He must help his grandfather.
15.I must wear warm clothers in the winter
16.They must talk with their parents.
17.We must go in USA
18.Dad must go to work tomorrow
19.Mother must cook in the morning
20.I must go to a friend.
