◎ 题干
_______ there is a snowstorm or some other bad weather, the mail always comes on time.
A.BecauseB.UnlessC.AsD.So
◎ 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“ _______ there is a snowstorm or some other bad weather, the mail always comes on time. A.BecauseB.UnlessC.AsD.So…”主要考查了你对  【并列连词】【从属连词】  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。