You should wear a helmet., , You should line up., , Don't forget to stay behind the line., , You should look left and right., , Don't forget to wash your hands., , Don't forget to wear your seatbelt., , You should use the crosswalk., , Don't forget to stop at the red light., , You should wear a face mask., , You should be quiet., .

Lesson 7. You should wear a helmet

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