1. must

2. can't

3. can't

4. don't have to

5. have to

B

In Russia you can't stay late outside until you are 18

Next week i have to do some exercises

During an exam you mustn't write off

You don't have to do your home task at the weekend

You must repeat new words when you learn a language

You musn't talk on your mobile phone while driving

Every day you have to clean your teeths

When you are a child you don't have to wash the dishes