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
