--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?

— I missed the earliest flight in the morning. It was really a pity. —You _________ to the airport by taxi instead of by bus.

______ I see your ID card, sir? We have to check your information.

—I didn’t tell him the news.—Oh, you ought _______.

– When can I get the ticket for the opening ceremony? -- Don’t worry. You ____ get one this very afternoon.