—How come everything tastes bitter?—Well, things ________ taste different to you when you are suffering a cold.

—What does the sign over there read?—No person        smoke or carry a lighted cigarette, cigar or pipe in this area.

—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?

You           be hungry after the long walk．Help yourself to some cakes．

— I am going to spend my holiday in the countryside. — ________. The air there is fresh and the views are attractive as well.