第一节 单项填空（共30小题；每小题1分，满分30分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳答案，并在答题卡上将该项涂黑。
21. _____ time went on, our teacher’s words proved true.
A. With B. As C. When D．While
22. Harry Potter VII _____ well all over the world.
A. is sold B. sells C. sell D. are sold
23. The color purple is a _____ of red and blue.
A. collection B. unity C. joint D. combination
24. Her latest album, The Element of Freedom, _____ last week and Keys has proved yet
again that she simply does her own thing.
A. came out B. came over C. came in D. came up
