The big hospital, which___in 1936, has saved many lives.

One witness said that he’d seen the suspect run out of the store after it___.

I___swim when I saw a sign written by the police.

—Another cup of coffee? That’s your third since lunch.
—Yeah, well, I ____ all night preparing for my history exam. I can hardly keep my eyes open.

—Why do you look so worried?
—My computer broke down and my essay ______ unfinished since.

--- Has your father returned from Africa yet?
--- Yes, but he         here for only three days before his company sent him to Australia.

22. ---Can we meet at 3 o’clock tomorrow afternoon?
--- That doesn’t suit me. I’m afraid I _____________.

--- ________ the class done most of the work?
--- Yes, but the rest ___________ rather difficult.

--- Sorry to have interrupted you. Please go on.  --- Where was I?
--- You ________ you didn’t like to be prejudiced against.

29．The young man，who by then    admission to university，decided to do some part-time jobs to gain more practical experience．