Correct sentences. Two are OK.

Popraw niewłaściwie napisane zdania. Dwa są poprawne. Jeżeli uważasz, że zdanie jest poprawne, wpisz "OK" w polu odpowiedzi.
1. Jim must visit his uncle. He has some news for the boy.
2. You don’t have to touch electric wires. Wait for the electrician to come.
3. You mustn’t ride a bike without a helmet.
4. We mustn’t work tomorrow. We have a day off.
5. Jim doesn’t have to drink and drive.
6. You don’t have to smoke. You will die.
7. We mustn’t visit Michael. He is coming over later.
8. Peter doesn’t have to study hard. The test is really difficult.