---Whose is the pencil box?---It _____ be Tom’s. Look at his name on the cover!

----____ I take the book out? ---- I’m afraid not. 

—Could I use your phone? —Yes, of course you ____ .

—Hi，Joan.Any idea where Tom is?—He ________ on the playground.I saw him there playing football just now.

She was greatly shocked at the scene before her eyes. Never did she expect that the local conditions ______ be so awful.