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        1. When something is on fire, people throw sand on it to put out the fire. The main use of the sand is to _________.
          A.protect the thing on fire
          B.a(chǎn)dd weigh to the thing on fire
          C.keep the air away from the thing on fire
          D.lower the temperature of the thing on fire
          C

          試題分析:句意:當某物起火的時候,人們?nèi)由匙釉诨鹕厦。主要目的是用沙子去阻止空氣與火的接觸?疾楣潭ǘ陶Z:keep sth. away from sth.保持某物遠離某物。故選C
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