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

试卷相关题目

• 1The wounded soldier died _____I had a chance to know his name and family.

  A.after

  B.while

  C.until

  D.before

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• 2Glass is obviously a wiser choice for the plate as it can easily be recycled and does not take hundreds of years to _____ like plastic.

  A.break off

  B.break out

  C.break down

  D.break into

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• 3Americans eat_____vegetables per person today as they did in 1910.

  A.more than twice

  B.as twice as many

  C.twice as many as

  D.more than twice as many

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• 4The ____________ of news that a flood is coming is a staff working in the weather bureau.

  A.resource

  B.origin

  C.root

  D.source

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• 5The lack of eco-friendly habits among the public is thought to be a major ____ of global climate change.

  A.result

  B.cause

  C.warning

  D.reflection

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• 6He _______a good idea finally.

  A.came up with

  B.came up

  C.came to

  D.came with

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• 7The witnesses ______ by the police just now gave very different descriptions of the fight.

  A.being questioned

  B.questioned

  C.to be questioned

  D.having questioned

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• 8With the word 'PM2.5'______ heard and seen in our life, people become more and more concerned about air pollution.

  A.constantly

  B.occasionally

  C.consequently

  D.contemporarily

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• 9---I am taking my driving test tomorrow! ---__________!

  A.Cheers

  B.Good luck

  C.Come on

  D.congratulations

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• 10She reached the top of the hill and stopped ____ on a big rock by the side of the path.

  A.to have rested

  B.resting

  C.to rest

  D.rest

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