第一部分听力：(略)
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和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标号涂黑。
21. It is really _____ useful dictionary, ______ dictionary every one of us needs．
A. an, a B. a, the C. the, a D. a, a
22. Unfortunately, it rained for two weeks, which completely _______ our plan.
A. ruined B. harmed C. crashed D. attacked
23. With his attention _____ on his book, he didn’t notice me enter his study.
A. focusing B. focused C. to focus D. focus
