He found very difficult the math problem．( )A．.this.solvingB．.that.to solveC．.it.solvingD．it.to solve 题目和参考答案——青夏教育精英家教网——

题目内容

9．He found very difficult the math problem．（　　）

A．

.this，solving

B．

.that，to solve

C．

.it，solving

D．

it，to solve

分析我发现解决这个数学问题很难．

解答答案：D．考查形式宾语．句意"我发现解决这个数学问题很难．．"考查句型结构：主语+find+it+形容词+to do sth．这里用it做形式宾语．真正的宾语是不定式短语．因此答案是D．

点评当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时，为保持句子结构平衡，避免句式结构的混乱，常用it作形式宾语，而将真正的宾语放在句尾．此时it仍只起先行引导作用，本身无词义．

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