—I can’t find my mobile phone anywhere. —You _____ have lost it while eating out.

--- Look, Mr Green is on the other side of the street. --- It _____ be him.He has gone to London on business.

—________I do the laundry first, Mum?—No, you ________. You can do your homework first.

----Will you take up teaching as a career after graduation?---- Hard to say. I ________ go abroad for higher education instead, but it depends. 

You _______be hungry already—you had lunch only two hours ago.