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. —Have you seen pen? I left it here this morning.
—Is it black one? I think I saw it somewhere.
A. a, the B. the, the C. a, a D. the, a
22. —I've never found a better job and I’m so glad.
— .
A. I don't think so B. Too bad
C. Congratulations D. Don't worry
