第一节语法和词汇知识（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，并在答题卡上将该项涂黑。
21．---Could I call you by the first name? ---Yes, you_______.
A. will B. could C. may D. might
22．______ is obvious ______he has finished his work.
A. What; that B. That; that C. It; that D. It; what
