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【B19】A.for allB.above allC.at allD.after all
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【B19】A.advisedB.saidC.askedD.wished
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Air is composed of ______ gas including hydrogen, oxygen and carbon dioxide.A.variedB.vari
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【B19】______A.spotB.schemeC.deadlineD.era
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【C6】A.prospectB.wayC.reasonD.necessity
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共用题干第一篇Is the Tie a Necessity?Tie
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B19表示平均镍的质量分数为19%的普通______铜。