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          The official said rescuers were working_____to find the missing miners in the coal mine blast.
          A．round the clockB．in the clockC．a(chǎn)round the timeD．in the meantime
          			
          


			
		
          
		
				
          
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          _____, about forty people travel in one bus, while the same number occupy thirty-three cars.
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          A．forB．onC．toD．in
          

			
          

			
          
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          A．a(chǎn)fterB．betweenC．a(chǎn)mongD．over
          

			
          

			
          
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