第一节 单选填空（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，并在答题卡上将该选项涂黑。
21.
—What about ________ book?
—It’s too difficult
________ book for beginners.
A. the; the B. a; a C. a; the D. the; a
22. We are going to talk about the problem _______ at the last meeting．
A．was discussed B．discussing C．discussed D．having been discussed
23. The teacher stressed again that students should not _______ any important details while retelling the story.
