He________a wild duck，but he didn't________it.

A．shoot at；shoot   B．shot at；shoot

C．shot；shot at  D．shoot at；shot

The lack of money forced them to________their research.

A．abandoned  B．abandoning

C．abandon  D．be abandoned

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

—Don't use my handkerchief to wipe the table，gentleman.

—Oh, I' m very sorry.I________clearly.

A．didn't see  B．hadn't seen

C．wasn't seeing  D．can't see

The school rule states that no child shall be，unless________by an adult，allowed out of the school during the day.

A．was accompanied  B．accompanying

C．accompanied  D．being accompanied