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				30．My mother finds          great fun  to learn to drive a car．A．it              B．this            C．the             D．what    Now  satellites are  31  to forecastthe weather．They are in space.and they can  32  any part of the world．The satellites take pictures of the  atmosphere .   33  this is where the  weather forms ．They send these  34  to the weather stations．So meteorologistscan see the weather of any  part of the world．From the  pictures.the  scientists can often say  35  the weather will change．    Today.nearly five hundred weather  stations in sixty countries receive satellite pictures．When they receive new pictures.the meteorologists compare them  with earlier  36  ．Perhaps they may find that the clouds have changed during the last  few hours．This may mean  that the  37  on the ground may soon change.too．In their next weather forecast.the meteorologists can say this．    So the  weather satellites are a great  38   to the meteorologists．  39  satellites were invented.the scientists could forecast the  weather for about 24 or 48 hours．Now they can make good forecasts for three or five days．Soon.perhaps.they may  40  forecast the weather for a week or more  ahead．			【查看更多】
			


		
           
          


		
          
		
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          My mother finds ________ great fun to learn to drive a car．
          

          

          [　　]
          

          A．it
          

          

          B．this
          

          

          C．that
          

          

          D．what
          

          

          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          

          My mother finds ________ great fun to learn to drive a car.
          

          [　　]
          

          

          A．it
          B．this
          

          C．the
          D．what
          

          

          

          

			
          
				查看答案和解析>>
			
          
		
          
				
          
									
          


          My mother finds ________ great fun to learn to drive a car.
          

          [　　]
          
          

          

          

          A．it
          		


          B．this
          		


          C．that
          		


          D．what
          		

          

          

          

			
          
				查看答案和解析>>
			
          
		
          
						
          
				
          
	
          
	
          
		
          


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