Запиши в тетрадь с помощью must или mussth`t правила для поездки на велосипеде.
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You must wear a helmet.

You must wear a brightly-coloured jacket.

You mustn't cycle on the pavement.

You must cycle on the road.

You must pay attention.

You must look to see who's coming.

You must listen for traffic.

You mustn't listen to music on your MP3 player.