单选题 As the busiest woman in Norton, she made ______ her duty to look after all the other people's affairs in that town.

【正确答案】 D
【答案解析】[考点] it作形式宾语
[解析] it作形式宾语,to look after all the other people's affairs in that town作真正的宾语。不定式短语作宾语,同时后跟宾补时,需将不定式移至宾语补足语之后,在原来宾语的位置上用引导词it作形式宾语,构成“make +it+形容词或名词+不定式短语”结构,从而使句子保持平衡。