_____ of the danger in the street at night, she had to go home, with a friend _____ her.A.Warned; followedB.Warned; followingC.Having warned; followedD.Having warned; following
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B解析本题考查非谓语动词。句子的主语she与warn之间是被动关系，且发生在句子谓语动词前，故应使用过去分词；后一个空格处是介词with的复合结构，friend与follow之间是主谓关系，应用现在分词。