Two things you SHOULDN'T do if you have flu.
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Two things you HAVE TO do if you want to live and work in an English-speaking country.
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Two things you SHOULDN'T do before bed.
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Two things you HAVE TO do after class.
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Two things you SHOULDN'T talk about with strangers.
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Two things you DON'T HAVE TO do if you shop online.
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Two things you SHOULD find out about a country before you visit it.
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Three things you DON'T HAVE TO do when you're on holiday.
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Two things you MUST do before you catch a plane.
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Two things you SHOULD do if you're invited for dinner.
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Two things you SHOULDN'T DO before an exam.
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One thing you MUST do and one thing you MUSTN'T do when you're driving.
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Two things you MUST think about before you buy a new phone.
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One thing you HAD TO do when you were a child and you really disliked.
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