Fill in: must, mustn't, have/has to, don't, / doesn't have to.

A: Can I help you with the documents?
B: No, you ..... . I can manage by myself.
2 You..... be late for school John.
B: Sorry, Dad. It won't happen again.
3 Sandra......... photocopy the documents. Jenny did it.
B: Yes, she ........ type a letter for the boss.