第二部分 英语知识运用（共两节，满分45分）
第一节 单项填空（共15小题；每小题1分，满分15分）
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. —What did you think of the place?
—I didn't care for it at ____first, but after ____ time I got to like it.
A. /; a B. the; a C. a; the D. /; the
22. It was in the library _________ I met him for the first time.
A. which B. when C. that D. who
