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				The teachers may use these exercise as part of class work or home       .   A. requirement  B. assignment  C. appointment  D. entertainment			【查看更多】
			


		
           
          


		
          
		
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          .The teache rfound ____ difficult to decide____ he would take with him to attend the 
            
          conference. 
            
            A.it;whom        B.himself;who       C.this;whom      D.that;who 
          

			
          
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