◎ 题干
By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _____ appeared a rare rainbow soon.
A. of which
B. on which
C. from which
D. above which
◎ 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“By nine o'clock, all the Olympic torch bearers had reached the top of Mount Qomolangma, _____appeareda rare rainbow soon.[ ]A. of which B. on whichC. from w…”主要考查了你对  【关系代词】【介词和介词短语】【非限制性定语从句】  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。