The teacher was worried about the boys in her class, for they spent ______ time playing computer games.
| A．large amount of | B．a large number of |
| C．a large amount of | D．large numbers of |
—Is Tom at home?
—No, he ______ to town.
| A．has been | B．has gone | C．goes | D．will go |
I hate traveling by air ______ you usually have to wait for hours before the plane takes off.
| A．because | B．though | C．until | D．unless |
Hurry up, or you ______ catch the train.
| A．needn’t | B．mustn’t | C．can’t | D．shouldn’t |
You can improve your English ______ practicing more.
| A．by | B．with | C．of | D．in |
—What’s wrong with you, Eric? You look tired.
—I ______ to prepare for the final exam last night.
| A．picked up | B．woke up | C．stayed up | D．put up |