In the sentence "Three-quarters of respondents thought it important to compare their incom
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In the sentence "Three-quarters of respondents thought it important to compare their incomes with others", the italicized part is a(n)______.
A．adverbial
B．appositive
C．object
D．object complement
请帮忙给出正确答案和分析，谢谢！
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正确答案：C
句子成分题。当不定式、动名词、从句等结构用作宾语且其后跟有宾语补足语时，为了平衡句子的结构，通常会在宾语补足语前使用形式宾语it，而将真正的宾语移至句末，形成“动词+it+宾语补足语+真正的宾语”这样的结构。原句中的it就是形式宾语，该句的正常语序是Three-quartersofrespondentsthoughttocomparetheirincomeswithothersimportant，其中不定式短语tocomparetheirincomeswithothers是谓语动词thought的真正宾语，与宾语补足语important构成复合宾语，故答案为[C]。