9.He found          very difficult         the math problem.(  )
A..this,solvingB..that,to solveC..it,solvingD.it,to solve

分析 我發(fā)現(xiàn)解決這個數(shù)學(xué)問題很難.

解答 答案:D.考查形式賓語.句意"我發(fā)現(xiàn)解決這個數(shù)學(xué)問題很難.."考查句型結(jié)構(gòu):主語+find+it+形容詞+to do sth.這里用it做形式賓語.真正的賓語是不定式短語.因此答案是D.

點評 當(dāng)不定式(短語)、動名詞(短語)或從句在某個句子中作賓語時,為保持句子結(jié)構(gòu)平衡,避免句式結(jié)構(gòu)的混亂,常用it作形式賓語,而將真正的賓語放在句尾.此時it仍只起先行引導(dǎo)作用,本身無詞義.

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