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She made a silly mistake because she hadn’t kept her        on her work.

A.head                         B.heart?                      C.brain                         D.mind

D


解析:

keep one’s mind on sth.专心于……。类似结构的近义短语为:put one’s heart into专心致志于……,该句意为:她因工作不用心,而犯了一个愚蠢的错误。

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New research suggests that the type of television you watched as a child has a great effect on the color of your dreams. While almost all people under 25 dream in color, thousands of people over 55, all of whom were brought up with black and white TV sets, often dream in monochrome (黑白画面).

  “It suggests there could be a critical period in our childhood when watching films has a big impact on the way dreams are formed,” said Eva Murzyn, a psychology student at Dundee University in Britain who carried out the study.

  Research from 1915 through the 1950s suggested that the vast majority of dreams were in black and white. But the tide turned in the sixties, and later results suggested that up to 83 percent of dreams contained some color. Since this period also marked the transition (过渡) between black?and?white film and TV and Technicolor (特艺彩色), an obvious explanation was that the media had been painting people's dreams. However, there weren't any firm conclusions.

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A.All the people who were below 25 dreamed in color.

B.People begin to dream when they are 10 years old.

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