Question

_____ 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

Answer 1

C

解析试题分析：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。
考点：考查非谓语动词的用法，
点评：首先要分析句子知道非谓语动词是做得什么成分，然后根据和修饰语的关系决定是现在分词还是过去分词或者不定式。