一、听力理解 (略)
二、单项填空 (每小题1分，共15分)
( )31. — Who is ______ owner of the invention?
— Jimmy. He is _____ active member of our science club.
A. an; the B. the; an C. an; an D. the; the
( )32. We divided ourselves ______ small groups to carry out the plan.
A. for B. at C. into D. about
( )33. Last night, the man found his lost car by _______. He called the police at once.
A. mistake B. present C. accident D. time
