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

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A. Being warned; acpanied
B. Having warned; acpanying
C. Warning; acpanying
(答案→)D. Having been warned; acpanying
解析：句意：她已经被警告晚上街上有危险，她不得不有一个朋友陪着回家。这里she与warn之间是被动关系，故排除BC；warn动作发生在谓语动词had to go home之前，非谓语动词的动作在谓语动词之前发生时，应该用完成时，又必须是被动，故选D。