It’s known us that a mouse has a good nose cheese. A. for ; forB. to ; forC. by ; toD. by

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A. for ; for
(答案→)B. to ; for
C. by ; to
D. by ; at
解析：考查介词：第一空填to，be known to sb为…所熟知，第二空填for，have a good nose for对…嗅觉灵敏，句意：众所周知，老鼠对奶酪嗅觉灵敏。选B。