Which is correct?
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1. We haven't got much time. We must / mustn't hurry.
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2. We've got plenty of time. We mustn't / don't need to hurry.
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3. I have to talk to Gary. I must / mustn't remember to call him.
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4. I have to talk to Gary. I mustn't / needn't forget to call him.
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5. There's plenty of time for you to make up your mind. You mustn't / don't need to decide now.
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6. We needn't / mustn't wash these tomatoes. They've already been washed.
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