I don't think it's good ________ you to eat too much．A.ofB.forC.withD.on
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B解析在It is+adj．+for(of)sb．to do sth．这个句型中，如果是表示人的某些性格特征的形容词，如good, kind, clever, foolish, polit, impolite等，应该用of；如果是difficult, easy, possible, impossible, necessary, important等形容词，则用for．例如：It is kind of you to help me．It is difficult for the boy to read this English book．