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

—Excuse me, where are we going to have our class meeting?—I’m not sure. Ask Li Hua, please. He _________ know.

---- It's so cold! Why are your windows still open?  ---- Oh, they _______．

 --- Don't worry. I've just sent an ambulance to you. They ________ be there any second.

You ________ be hungry already — you had lunch only two hours ago!