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Too much drinking would _____ his health.
A、do harm for
B、do harmful to
C、do harm to
D、do harmful for
【正确答案】：C
【题目解析】：本题考察harm和harmful构成的短语的用法。sb./sth. do harm to sb./sth.意思是“某人/物对某人/物有害”，其后接名词；与此短语相近的是sb./sth. be harmful to sb.，选项中只有C的组合正确。