All those second-hand goods are sold at before．
| A．30％as lower price as | B．30％as low a price as |
| C．as 30％low price as | D．30％lower price than |
How ______ you say that you really understand the whole story if you have covered only part of the article?
| A．can | B．must | C．need | D．may |
–Smoking is bad for your health. --Yes, I know. But I can’t _____.
| A．give it in | B．give it up | C．give it out | D．give it away |
Many new buildings are being ________ in this area now.
| A．put up | B．put up with | C．put on | D．put out |
You shouldn’t accept a gift from a person _____ you don’t know him.
| A．until | B．unless | C．if | D．whether |
I first met Lisa three years ago. She _______at a clothes shop at the time.
| A．has worked | B．was working | C．had been working | D．had worked |