1.  I must be go a sleep, next time talk with you .

2.  so we must be devide .

3.  there must be a political reason in history.

4.  if we go broad, first we must be able to speak English.

5.  Their teachers must be proud of them.

6.  She must be careful of her child's study, and the child's health.

7.  So there must be somebody else on the island.

8.  Ideal mustn't be great .

9.  We must be honest.

10.  You must be comfortable when you come into this green place.