题目内容
（请给出正确答案）
[主观题]
He has apologized ______ her ______ being absent from the conference.A．for, forB．to, toC．f
He has apologized ______ her ______ being absent from the conference.
A．for, for
B．to, to
C．for, to
D．to, for
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A．等价交换机制
B．竞争机制
C．信息机制
D．风险机制
