—The research on the new birds flu virus vaccine is challenging and demanding. Who do you think can do the job —my students have a try

单项选择题—How dangerous it was !—Yes, but for the passerbys quick action, the girl.

单项选择题Because of the financial crisis, days are gonelocal 5star hotels charged 6,000 yuan for one night.

单项选择题Pop music is such an important part of societyit has even influenced our language.

单项选择题—If you keep on breaking the rules, you will be fired.— I dont care.

单项选择题—Do you mind my opening the window Its a bit hot in here.—, as a matter of fact.