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				20．You            the light．It’s  bright enough here．We can see everything clearly．A．mustn’t turn off   B．must turn on      C．needn’t  turn on    D．may turn on			【查看更多】
			


		
           
          


		
          
		
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          You ________the light．It’s bright enough here．We can see everything clearly．

          1. A.
            mustn’t turn off
          2. B.
            must turn on
          3. C.
            needn’t turn on
          4. D.
            may turn on
          

			
          
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