第二部分 英语知识运用（共两节，满分45分）
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. Tom, you ______ leave all your clothes on the floor like this!
A. wouldn’t B. mustn’t C. needn’t D. may not
23. Have you seen the film “Titanic”,_____ leading actor is world famous?
A. its B. it’s C.whose D.which
