You'd sound a lot more polite if you make a request _____ a question.

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• 1_____ he used to play a lot of computer games, but now he seems to have lost interest in them.

  A.At a time

  B.At one time

  C.At all times

  D.At the same time

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• 2— How much is too much for a schoolbag? — Experts say students should carry ______ more than 10 or 15 percent of their body weight.

  A.no

  B.not

  C.any

  D.far

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• 3Elizabeth has already achieved success ______ her wildest dreams.

  A.at

  B.beyond

  C.within

  D.upon

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• 4______ the serious sandstorms that have hit the city recently, the quality of the air in Beijing is very poor.

  A.Apart from

  B.Due to

  C.Instead of

  D.Thanks to

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• 5— How can we finish the task in such a short time? — Don't be worried. There ______ willing helpers.

  A.were not lack of

  B.are no short of

  C.was no short of

  D.is no lack of

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• 6Luckily, the bullet narrowly missed the captain _______ an inch.

  A.by

  B.at

  C.to

  D.from

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• 7— Are you free after school?— Sorry, I've planned to treat a friend of mine to dinner _____ for help.

  A.in order

  B.in return

  C.in turn

  D.in honor

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• 8The famous artist said that his success was _____ his hard work and perseverance.

  A.due to

  B.next to

  C.close to

  D.lead to

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• 9The desks in our classroom are so close together that there is not enough room to move _______ them.

  A.between

  B.beyond

  C.across

  D.over

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• 10The Tibetans have lived in the Himalayas for centuries and have adjusted to the conditions _______.

  A.at such great height

  B.at such a great height

  C.on such great height

  D.on such a great height

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