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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Chinese President Xi Jinping, ______ by Manchester United former players and ambassadors, enjoyed an exhibition from National Football Museum, ______ major historical artifacts （历史文物） were on display.
A.
greeting; where
B.
greeting; in which
C.
greeted; where
D.
greeted; in that