My uncle ________ a worker, but now he _______in an office.

— Hello, Sandy. This is Jack. What are you doing?— I’m watching a match. It started at 7 p.m. and _____ on for another half an hour.

--- What do you think of the film Avatar? --- It’s fantastic. The only pity is that I _______ the beginning of it.

Jeremy Lin __________ an unknown basketball player in New York Knicks for quite a long time.

If I______ you, I_______ go there at once.