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精英家教網 > 初中英語 > 題目詳情

Now many children like surfing on the Internet, but ________ the same time they should know that there is something unhealthy on it.


  1. A.
    in
  2. B.
    by
  3. C.
    at
  4. D.
    on
C
解析:
at the same time是一個固定搭配,意為“同時”.
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In real life, robots are mainly used in factories. They do many different jobs. Usually these jobs are too       , difficult or boring for humans.

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In the United States, another        of robot helps disabled workers. This robot, called Kilroy, helps disabled computer operators. The robot         the sound of its owner’s voice. It follows instructions such as “Turn the page” and “Make a cup of coffee”.

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