■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。
21. —Mum, I hope we can spend our holiday abroad this year.
—______ I’m too busy to take a trip abroad.
A. Better forget it. B. Why not?
C. It couldn’t be better. D. Good idea!
