单项填空(共15小题, 每小题1分,满分15分)
21. — Is your present pension sufficient to cover your cost of living?
— Enough and to spare. _________.
A. I can’t complain. B. Serve me right.
C. I’ve had enough of it. D. I can’t be too particular.
22. Now many 3D film directors tend to use state-of-the-art technology to the story , so that the films attract audience’s attention very much.
A. bring; to light B. get; across C. bring; to life D. get; through
23. One way for students to prevent H7N9 flu virus is to open the windows of the classroom to allow the air to ________.
A. accumulate B. circulate C. illustrate D. accelerate
