二、单项填空（共15小题；每小题1分，满分15分）
21. We don’t understand what the professor means, but we’ve got ____ rough idea of ____ project plan.
A. the; a B. the; / C. a; the D. a; /
22. ____ in the area reported _____ three people robbing the bank with their heads wrapped in stocks.
A. Witness; to look at B. Witnesses; seeing C. Witnesses; looking out D. Witness; to see
23. ---At this time tomorrow _______ over the Atlantic.
---Oh, wish you a good journey.
A. we’re going to fly B. we’ll be flying C. we’ll fly D. we are to fly
24.
