◎ 题干
--I hear Jack Chan will come to Laiwu next week.
--Really? _______ he comes, my younger sister will be very happy,
A.IfB.UntilC.UnlessD.Before
◎ 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“--I hear Jack Chan will come to Laiwu next week. --Really? _______ he comes, my younger sister will be very happy,A.IfB.UntilC.UnlessD.Before…”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。