从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．Hong Kong has a lot of advantages including free flow of ______information, a fair competitive environment and ______efficient local government．
A．the, an B．不填; the C．不填; an D．the; the
22．Christmas is a holiday usually celebrated on December 25th ____ the birth of Jesus Christ．
A．in charge of B．in terms of C．in favor of D．in honor of
