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.—Here you are at last!
—_______
A. Are you all right? B. Yes, I ‘m here.
C. You are here, too. D. Sorry for having kept you waiting that long.
22. It’s not easy for me to ____in ______car.
A. be sleepy; a sleeping B. fall asleep; a sleeping
C. go to sleep; the sleep D. have a sleep; the sleep
