.A man may be known - he keeps.A. by the manB. by the womanC. by the companyD. the firm

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A. by the man
B. by the woman
(答案→)C. by the pany
D. the firm
解析：词义辨析。Man人，男人；woman女人；pany伙伴，朋友；firm公司；可以从一个交什么朋友来了解这个人。故选C。