摘要:7.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 解析:选B.考查非谓语动词和定语从句.“发现自己被一群十几岁的孩子包围了. 用过去分词作宾语补足语表示被动.第二处用who 引导定语从句.修饰teenagers.

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