◎ 题干
When he looked up, he suddenly found himself _____ by a group of teenagers, _____ looked at him
anxiously.
[     ]
A. to be surrounded; which
B. surrounded; who
C. be surrounded; who
D. having been surrounded; which
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“When he looked up, he suddenly found himself_____ by a group of teenagers,_____ looked at him anxiously.[ ]A. to be surrounded; whichB. surrounded; whoC. b…”主要考查了你对  【关系代词】【过去分词】【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。