He was a kind teacher I went for advice.Ato whomBwhomCto whoDwho

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(答案→)A. to whom
B. whom
C. to who
D. who
解析：句意：他是一位好老师，我经常向他征求建议。这个句子含有一个定语从句，go to sb. for advice是固定用法，意思是向某人征求建议，关系词指人，且前面有介词，只能用whom， 选A。