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				22．After they finished their homework.the students asked their  teacher        next．   A．when do   B．how to do   C．what to do      D．which doing			【查看更多】
			


		
     
    


		
    
		
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    After they finished their homework，the students asked their teacher_______ next．
      
    A．when do      B．how to do     C．what to do         D．which doing
    

			
    
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