— May I go and play football with Dick this afternoon, Dad?
— No, you can’t go out ________ your work is being done.
| A．before | B．until | C．as | D．after |
_____the days went on , the weather got colder ..
| A．With | B．As | C．Since | D．For |
The most important thing about cotton in history is _____ part that it played in _____ Industrial Revolution.
| A．不填；不填 | B．the；不填 | C．the; the | D．a; the |
—What do you think of the manager of your company?
—Oh, he is ________ manager who’s pleasant to work with.
It’s ________ pleasure to work with him.
| A．the; a | B．a; a | C．a; the | D．不填; a |
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a | C．/; the | D．the; a |
—What about ____ book?
—It’s too difficult ____ book for beginners.
| A．the; the | B．a; a | C．a; the | D．the; a |