◎ 题干
—May I speak to Mr.Smith?
—I am afraid not.He is at a meeting now.It's not ________.
A.reliableB.convenient
C.beneficialD.available
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—May I speak to Mr.Smith?—I am afraid not.He is at a meeting now.It's not ________.A.reliableB.convenientC.beneficialD.available…”主要考查了你对  【序数词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。