第二部分英语知识运用（共两节，共55分）
第一节单项选择（共15小题，每小题1分，共15分）
从A、B、C、D四个选项中，选出可以填入空白的最佳选项，并在答题卡上将该项涂黑。
21. —We could invite John and Barbara to the Friday night party.
—Yes， ？I’ll give them a call right now.
A. why not B. what for C. why D. what
22. They blamed the failure on George. Actually, he
A. is not to blame B. is to blame C. is not to be blamed D. should not blame
23. There are some health problems that, when ________in time, can become bigger ones later on.
A. not treated B. not being treated
C. not to be treated D. not having been treated
24. —What’s the matter with Mary?
—Well, her parents wouldn’t allow her to go to the party, but she still _________.
A. hopes to B. hopes so C. hopes not D. hopes for
25. — busy schoolwork, the children also have to take arts, music and sports classes in their
