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9、 Babrack Obama was elected the 44m president of the United States，          a new chapter in the country’shistory.     

    A. opened            B. opens           C. opening        D to open

9、C

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 Babrack Obama was elected the 44m president of the United States，          a new chapter in the country’shistory.     

    A. opened            B. opens           C. opening        D to open

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