It was playing computer games ____ cost the boy plenty of time ____ he ought to have spent doing his lessons.
| A．what; that | B．that; when | C．which; that | D．that; that |
—The room is so dirty.________ we clean it?
—Of course.
| A．Will |
| B．Shall |
| C．Would |
| D．Do |
—Next week we’ll have the final English exam.
—Yes. Then, every minute must be made full use ________ English.
| A．of studying |
| B．to study |
| C．of being studied |
| D．of to study |
—Can I help you, sir?
—Yes. I bought this radio here yesterday, but it ________.
| A．didn’t work |
| B．won’t work |
| C．don’t work |
| D．doesn’t work |
A left-luggage office is a place where bags ________ be left for a short time, especially at a railway station.
| A．should |
| B．can |
| C．must |
| D．will |
—I heard that they went skiing in the mountains last winter.
—It ________ true because there was little snow there.
| A．may not be |
| B．won’t be |
| C．couldn’t be |
| D．mustn’t be |