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				27．I was doing my homework              my mother was cooking． A．a(chǎn)fter        B．because       C．while      D．a(chǎn)s soon as			【查看更多】
			


		
     
    


		
    
		
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    I was doing my homework ___________ my mother was cooking．
      
    A．a(chǎn)fter            B．because              C．while             D．a(chǎn)s soon as
    

			
    
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