1. Circle the correct option in these true sentences: 1) Students in the UK mustn't / don't have to go to school on Saturdays. 2) People have to / don't have to be quiet in the library. 3) In the UK, drivers must / mustn't drive on the left, not the right. 4) You mustn't / don't have to eat crisps in class. 5) A person has to / doesn't have to study for years to become a doctor. 6) Teachers must / mustn't mark their students' homework.

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