单选题 ______ wealthy does not necessarily mean that a man is greedy.
A. For the reason that he is B. The reason of being
C. Just because he is D. That he is

【正确答案】 D
【答案解析】[解析] that引导的从句作主语，谓语动词用第三人称单数。介词for引导的短语，只能作状语，不能作主语。because引导的从句也只能作状语，不能作主语。表示“理由，原因，缘故”解的reason作主语时，谓语动词一般用be动词。