The professor________at the meeting will give us a lecture next week.
A．referred B．referred to
C．referring D．referring to
The little girl________the bus as soon as it stopped，but to her disappointment，there were no seats left.
A．got on B．got out of
C．got off D．got to
He________his leg when he________in a football match against another school.
A．broke；played B．has broken；was playing
C．broke；was playing D．broke；had played
From the dates________on the gold coin，it is confirmed that it was made five hundred years ago.
A．marking B．to be marked
C．marked D．having been marked
Linda worked for the Minnesota Manufacturing and Mining company，________as 3M.
A．knowing B．known C．being known D．to be known
—We all had a lot of fun at the barbecue yesterday. Pity you
weren't there.
—I really should have gone with you but I________on some
remaining problems.
A．worked B．was working
C．would work D．would have worked
