Half of her time                 in the library.

--Alice, please tell Eric to call me when he _____ back. --No problem. 

— Have you finished your homework?— Not yet. But I _______ it in half an hour.

—Did you see a man in black pass by just now?—No, sir. I ______ a newspaper.

6. So far, most of the work              by others, it’s your turn to do the rest of it.