(2013·长沙二模)—The research on the new flu virus vaccine is..
(2013·长沙二模)—The research on the new flu virus vaccine is challenging and demanding.Who do you think can do the job?—________ my students have a try?A.May B.MustC.Will D.Shall
—It's no easy task to catch a ticket on a website that rece..
—It's no easy task to catch a ticket on a website that receives 1 billion clicks daily.—I can't agree with you more. There ________ be errors for every single step.A.should B.mustC.can D.will