Ответ:
1.This story can not be true.
2.We’re going to Japan tomorrow. – Oh, you must be excited!
3.She can your help.
4.One million dollars? You must be joking!
5.You may stay with us.
6.He should visit a doctor.
7.It is bitter. It can't be honey.
8.All children must study at school.
9.They must have already come.