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            • 1．

              As we all know, the Olympic Games are held_______ _______ ______. So the next summer Olympic Games will be held in 2020

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            • 2．

              ________ steel workers in the country go on strike. For example, ________ steel workers have been on strike in their town.

              A．Thousands, thirty thousands
              B．Thousand of, thirty thousand
              C．Thousands of, thirty thousand
              D．Thousands of, thirty thousand of
              难度：易
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