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				Let's     to clean the house. It's too dirty.  A.set about  B.set out     C.set off    D.set down			【查看更多】
			


		
           
          


		
          
		
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          Let's ________ to clean the house. It's too dirty.
          

          [　　]
          

          

          A．set about
          B．set out
          

          C．set off
          D．set down
          

          


          

			
          
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