1) Firefighters _______ wear a uniform a) MAY b) HAVE TO c) DON'T HAVE TO 2) I ________ stop bitting my nails a) MUST b) MAY c) MUSTN'T 3) You _______ smoke here, it's forbidden a) MUST b) MUSTN'T c) DON'T HAVE TO 4) You _______ to bring a coat, it's really hot in Hawaii! a) have b) must c) don't have 5) Donald Trump _______ work, he's rich enough to live without working a) doesn't have to b) don't have to c) must 6) You ___________be quiet if you go to the library. a) may b) have to c) shouldn´t 7) You ____________ talk on the phone while you drive. a) have not to b) must c) mustn´t 8) My brother ___________ to listen to my advice. a) may b) has to c) ought

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