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        1. Sam spends two hours _______ his homework every day.
          A.to doB.doingC.doD.does
          B

          試題分析:句意: Sam每天花兩個小時的時間做家庭作業(yè)。spends sth( in) doing sth花費時間在做某事上,in可以省略。故選B。
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