1) The museum is free. You ... pay for the entrance.  a) mustn't b) don't have to c) doesn't have to 2) We ... smoke in public places. It's prohibited.  a) mustn't b) don't have to c) doesn't have to 3) Your job is from Monday to friday. She ... come on weekend.  a) mustn't b) don't have to c) doesn't have to 4) Toni ... drink and drive.  a) doesn't have to b) don't have to c) mustn't 5) I ... tidy my room today because I cleaned it yesterday a) mustn't b) doesn't have to c) don't have to 6) That river is extremely dangerous. You ... swim in it.  a) doesn't have to b) don't have to c) mustn't 7) We ... forget to set the alarm before we leave our house.  a) don't have to b) doesn't have to c) mustn't 8) A waiter ... steal a food a) mustn't b) doesn't have to c) don't have to 9) a doctor ... speak at least 3 languages a) doesn't have to b) mustn't c) don't have to 10) a pilot .. be afraid of lying a) mustn't b) doesn't have to c) don't have to

The obligation Game

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