问题
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【C19】A.advantageB.exceptionC.measureD.charge
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【C19】A.plainB.earnestC.commonD.usual
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【C19】A.tastelessB.tastyC.tastefulD.taste
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【C20】A.systematicB.optimisticC.realisticD.statistic
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【C18】A.positiveB.optimisticC.activeD.negative
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The authors attitude in this passage is______.A.skepticalB.optimisticC.unclearD.objective