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—It has been one of the biggest killers of men.
—I think it's everyone's duty. We all should not betray (背叛) our country.
—So people mustn't drive after drinking.
—It is so ________.
—________ down on the sofa and have a rest.
—Sorry, I forgot to set the alarm clock and got up late.
—Now he has gotten well and left hospital.
—What's more, she remembers what she has learnt.
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