PIE (Unit 5)
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Visitors ______ smoke in the building. (don't have to/ mustn't)
mustn't
It’s a relaxed office – you ______ wear a tie. (have to/ don't have to)
don't have to
I start at 10 a.m., so I ______ get up early. (don't have to/ have to)
don't have to
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