—Must I give up drinking coffee, doctor? —No, you _________. Drinking coffee is good for your health. A. can’t B. mustn’t C. needn’t |
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你能帮帮他们吗
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The weather turned out to be fine yesterday.You __the trouble to carry your raincoat with you.
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求极限lim(x-->正无穷)[(x+1)ln(x+1)-(x+1)lnx]
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