We all feel sorry for ______ for so long after your arrival.

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问题 We all feel sorry for ______ for so long after your arrival.

选项 A、keep you waiting
B、having kept you waiting
C、waiting for you
D、keep you wait

答案B

解析 介词后面要跟动名词做宾语;当动名词的动作在谓语动词所表示的动作之前发生时,要用动名词的完成式。例如;Thank you for having helped me so much. (感谢你给了我这么多的帮助。)
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