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____________ the situation, Charles Yerkes undertook ____________ the system in 1902 by obtaining ownership of many different lines.


  1. A.
    Seeing, improving
  2. B.
    Seen , improved
  3. C.
    To see, to improve
  4. D.
    Having seen, improving
D
試題分析:考察分詞作狀語和固定搭配。第一空的動詞see與句子主語Charles Yerkes構成主動關系,說明使用現在分詞,因為這是已經發(fā)生的事情,故使用完成式。第二空是固定詞組undertake doing sth承諾做某事。故D正確。
考點:考察分詞作狀語和固定搭配
點評:固定搭配是學習語言的重要環(huán)節(jié)。要掌握好英語,記憶相當數量的詞組是必不可少的。英語中的每一個詞組,不僅表達一定的概念,具有一定的詞匯意義,而且在語音、拼法、語法等方面都有自己的特點。在學生學習英語的過程中,單詞、詞組記憶是基礎。解答這類題目,關鍵是理解題干意思以及各選項詞組的意思,可以像數學中的代入法一樣,依次把各個選項意思放入句子中進行比較,不難選出正確答案。當分詞做狀語的時候,如果構成分詞的動詞與句子的主語構成主動關系,就使用現在分詞做狀語;當二者構成被動關系,使用過去分詞做狀語。如果分詞的動作發(fā)生在謂語動詞之前,就使用分詞的完成式。如果分詞與句子的主語沒有關系,可以使用狀語從句或者獨立主格結構。
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