．-七年级数学

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• —Have you been to the United States?—Yes, only once. I ________ there only for seven days.A．stayedB．
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• -八年级数学
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• 下列计算正确的是[]A．B．C．D．-九年级数学
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• Hurry up! The train ______． You know it______ at 8:30 am．A．leaves; leavesB．is leaving; is leavingC．l
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• -八年级数学
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• 下列运算正确的是[]A．3a3×2a2=6a6B．4a2÷2a2=2aC．3=2D．-九年级数学
• Ladies and gentlemen, please fasten your seat belts. The plane _____.A．takes offB．has taken offC．too
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• . I’ve won a holiday for two days to Florida. I _______ my mum.A．have takenB．am takingC．takeD．will h