第一节 单项填空(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. - The book isn’t easy for Jack to understand, is it?
- ______ . His foreign language is
far better than expected.
A. No, it isn’t
B. I’m afraid not
C. I don’t think so
D. Yes, it is