从A、B、C、D四个选项中，选出可以‘人空白处的最佳选项,并在答题卡上，将该项涂黑。
21. The Mid-Autumn Festival is special holiday for most Chinese when whole
family will get together.
A. the； the B. a; the C. a； a D. the; a
22. —Mary, remember to come and sec us next time you're in town.
A. Why? ril certainly do B. Sounds nice
C. You're welcome D. Sure, I will
23. 一Can't you stay a little longer? I really want to talk more with you,
—Me, too. I have to get home before 10 at night.
A. But B. Since C. And D. For
