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The secretary worked late into the night, _____ a long speech for the president.
A.to prepareB.preparingC.preparedD.was preparing
B

試題分析:考查分詞做狀語。本題中的動詞prepare與句子主語the secretary構(gòu)成主動的關(guān)系,故使用現(xiàn)在分詞表示主動和正在進行。句意:那個秘書一職工作到深夜,為主席準備一個很長的發(fā)言稿。故B正確。
點評:當分詞做狀語的時候,如果構(gòu)成分詞的動詞與句子的主語構(gòu)成主動關(guān)系,就使用現(xiàn)在分詞做狀語;當二者構(gòu)成被動關(guān)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(guān)系,可以使用狀語從句或者獨立主格結(jié)構(gòu)。
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