How do your parents usually go to work?—My mother usually goes to work _________ bus while my father ________ a bike to work.

I have a friend _______ is training for the Olympics．　

He went to see the man who was in hospital yesterday.— ________. But we didn’t meet him there.

Where is Mike? —He’s _______ the pool.

My brother likes playing ____ football, but he doesn’t like playing ___ piano.