第一节 单项填空（共10小题；每小题1分，共10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。
21. —Have you seen watch? I left it here his morning.
—I think I saw one somewhere .Is it new one?
A. a;不填 B. a；the C. the; a D. a; a
22. has already been pointed out, grammar is not a set of dead rules.
A. As B. It C. That D. Which
