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				21．---He has got          idea．He lets his sister go with him．---That’s          good idea．A．a(chǎn),an           B．a(chǎn),a            C．a(chǎn)n,a          D．a(chǎn)n,an			【查看更多】
			


		
           
          


		
          
		
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          ---He has got ________ idea．He lets his sister go with him．
            
          ---That’s ________ good idea．
            
          A．a(chǎn)；an               B．a(chǎn)；a                C．a(chǎn)n；a                 D．a(chǎn)n；an
          

			
          
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