I witnessed the whole terrible accident, so I was taken to the police station and described it .
| A．at length | B．at stake | C．on purpose | D．on end |
______young(Young) man as he is , he has managed to have ______ knowledge of cultural differences of different countries.
| A．A; the | B．A; a | C．/; / | D．/; a |
--The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
--________ my students have a try?
| A．Should | B．Shall | C．Will | D．May |
How long do you thinkthe car factory launches a new model?
| A．will it be until | B．it will be before |
| C．will it be when | D．it will be that |
—Haven’t you solved the problem yet?
—Sorry, but I promise it in an hour.
| A．will be settled | B．will settle |
| C．has been settled | D．has settled |
________ the heavy snow came, the weather got colder and colder.
| A．As | B．Since | C．With | D．While |