21st Century, _____ weekly newspaper, provides us with ______ variety of fresh articles about campus studies and life.
| A．a; a | B．the; the | C．a; / | D．the; / |
If you really want yourself to be in good health, you must ___ always ___ so much.
| A．not; be smoking | B．not; have smoked | C．not; to smoke | D．be not; smoking |
One ought _____ for what one hasn’t done.
| A．not to be punished | B．to not be punished |
| C．to not punished | D．not be punished |
I didn’t see her in the meeting room this morning. She _____ at the meeting.
| A．mustn’t have spoken | B．shouldn’t have spoken |
| C．needn’t have spoken | D．couldn’t have spoken |
----Did you happen to see ____ black and ____ white cat?
----Is she missing? I told you to take care of her.
| A．the; the | B．the; / | C．a; / | D．a; the |
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a |
| C．/; the | D．the; a |