According to scientists, our mental abilities begin to______    from the age of 27 after reaching the highest level at 22.

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• 1"It's a such nice place," Mother said as she sat at the table________ for customs.

  A.to be reserved

  B.Living reserved

  C.reserving

  D.reserved

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• 2The research lacks______evidence, and therefore, its conclusions are doubtful.

  A.solid

  B.fierce

  C.severe

  D.potential

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• 3We live in an age______more information is available with greater ease than ever before.

  A.why

  B.when

  C.to whom

  D.on which

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• 4I think Tom, as the head of a big department, should either study regularly or______    his job.

  A.quits

  B.to quit

  C.quitting

  D.quit

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• 5Your______    as a student will be excellent if you develop a habit of reflecting on how you learn.

  A.operation

  B.growth

  C.performance

  D.character

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• 6Peter had intended to take a job in business, but _____    that plan after the unpleasant experience in Canada in 2010.

  A.had abandoned

  B.abandoned

  C.abandon

  D.will abandon

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• 7Brown said he was by no means annoyed;_____ he was glad to be able to make himself clearly understood.

  A.all in all

  B.for one thing

  C.on the contrary

  D.by the way

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• 8Armed with the information you have gathered, you can_______ preparing your business plan.

  A.set out

  B.set about

  C.set off

  D.set up

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• 9— Alvin, are you coming with us、— I'd love to, but something unexpected______.

  A.has come up

  B.was coming up

  C.had come up

  D.would come up

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• 10Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.

  A.which

  B.who

  C.where

  D.whom

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