–Mom, must I stay there the whole day?
--No, you______. You ____ come back after lunch, if you like.
| A．mustn’t, can | B．needn’t, must |
| C．needn’t, may | D．mustn’t, may |
Don’t say bad words ______ your friends. It’s ________.
| A．about, polite | B．to, impolite |
| C．at, polite | D．about, impolite |
—Oxfam trailwalkers in Hong Kong have to climb________ twenty hills and mountains.
—It’s really a tough hike.
| A．through | B．around | C．over | D．along |
Alice learned the news TV that a Chinese student was killed in Boston marathon blasts.
| A．for | B．on | C．with | D．about |
Vienna,the capital of Austria,is the River Danube and The Blue Danube is auss.
| A．on; for | B．in; by |
| C．on;by | D．by;on |
Lucy met her mother in the park by chance.
| A．with accident | B．by accident |
| C．by mistake | D．by opportunity |