第二部分 英语知识运用（共两节，满分45分）
第一节：单项选择（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. The pilot asked all the passengers on board to remain ________ as the plane was making a landing.
A. seat B. seating C. seated D. to be seating
22. Luckily, we’d brought a road map without ________ we would have a lost our way.
A. it B. that C. this D. which
23. We wanted to get home before dark, but it didn’t quite ________ as planned.
A. make out B. turn out C. go on D. come up
24. There is no light in the dormitory. They must have gone to the lecture,________?
A. didn’t they B. don’t they C. mustn’t they D. haven’t they
