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          The earth is       years old.
          A．four thousands six hundredsB．four thousand six hundred
          C．four thousand and six hundred millionD．four thousand six hundred millions
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C
          在英文中的數(shù)詞表示具體的數(shù)量不可以使用復(fù)數(shù)，故本題不選AD，B項(xiàng)的含義是地球有4600年，與實(shí)際不符，故不選B，故本題選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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