the office work, he came to the sitting room and relaxed a while.A. FinishingB. Being fin

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A. Finishing
B. Being finished
(答案→)C. Having finished
D. Finished
解析：考查非谓语动词。主语he 与finish之间是主谓关系，且分词的动作发生在谓语动词之前，故用现在分词的完成式。句意：完成办公室的工作之后，他来到起居室放松了一会。所以选C。