(2013·北京东城二次联考)—________ you interrupt now？Can't you see I'm on the phone?—Sorry，sir，but it's urgent.

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

—Look at the sign. You_____ fish here.—Sorry, I didn’t know.

You ________ touch the chemical, or you ________ get burnt.

—— Where is your father?  —— He has gone to the supermarket. He __________ at home.