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31. John was late for the business meeting because his flight had been _____ by a heavy storm.
A.kept B.stopped C.slowed D.delayed
𰸣D
32. It's ten years since the scientist _____ on his life's work of discovering the valuable chemical.
A.made for B.set out C.took off D.turned up
𰸣B
33. Hospital staff burst into cheers after doctors completed a 20-hour operation to have _____ one-year-old twins at the head.
A.isolated B.separated C.divided D.removed
𰸣B
34. I don't _____ rock 'n' roll.It's much too noisy for my taste.
A.go after B.go away with C.go into D.go in for
𰸣D
35. He accidentally _____ he had quarreled with his wife and that he hadn't been home for a couple of weeks.
A.let out B.took care C.made sure D.made out
𰸣A
36.Although _____ experience, the members of the team played well in the football game.
A lacked B lacking of C lacking D lacked of
𰸣C
37._____ you've tried it, you can't imagine how pleasant it is.
A Unless B Because C Although D When
𰸣A
38.There's no light on they _____ be at home.
A can't B mustn't C needn't D shouldn't
𰸣A
39.We often provide our children with toys, footballs or basketballs, _____ that all children like these things.
A thinking B think C to think D thought
𰸣A
40.Some people in parts of the world are wasting food _____ some others haven't any.
A since B when C as D while
𰸣D
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