13．Obama was elected president last year, who is first black president of U.S. ——青夏教育精英家教网—

摘要：13．Obama was elected president last year, who is first black president of U.S. A．/, a, the B．/, the, the C．the, a, / D．the, the, /

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Obama was elected ____ president last year, who is ______ first black president of _____ U.S.

A. /, a, the B. /, the, the C. the, a, / D. the, the, /

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