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．— We are too busy to take ________ holiday at ________ present.
— But I think we’ll be able to take ________ two weeks from now.
A. a; /; one B. the; /; that
C. a; the; it D a; /; it
22．The old man came ________ to the railway station, only ________ the train was slowly pulling out of the station.
