Mr Black is the professorI have the greatest respect.A. to whomB. for whomC. whomD. who

问题补充：

Mr Black is the professorI have the greatest respect.

A. to whom

B. for whom

C. whom

D. who

答案：

A. to whom

(答案→)B. for whom

C. whom

D. who

解析：本题定语从句的先行词是the professor，后面的定语从句中有一个固定搭配have respect for sb对某人尊敬；whom指代先行词在句中作为介词for的宾语。句义：布莱克先生是我最尊敬的教授。故B正确。