of danger in the street at night she had to go home with a friend her.A. Warning foll

问题补充：

of danger in the street at night, she had to go home, with a friend her.

A. Warning, following

B. Having warned, following

C. Having been warned, following

D. Warned, followed

答案：

A. Warning, following

B. Having warned, following

(答案→)C. Having been warned, following

D. Warned, followed

解析：考查非谓语动词用法。Warn与she之间构成被动关系，所以使用过去分词表示被动，排除BC。Warned和Having been warned都可以，第二空的friend与follow构成主动关系，故使用现在分词的形式，故C正确。