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				21．A．if            B．though         C．because        D．since			【查看更多】
			


		
           
          


		
          
		
          題目列表(包括答案和解析)
          

		
		
          

          


          
	
          				
          
									
          

          Bob spends lots of money ________ he is not rich．
          

          

          [　　]
          

          A．if
          

          

          B．though
          

          

          C．since
          

          

          D．because
          

          

          

			
          
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          __ we are young, we can still do something to help
protect the environment.
          


          A．If                B．Since             C．Because          D．Though
          


           
          

			
          
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          This dress still looks beautiful on her _____ it is
last year’s style.
          


          A．because          B．though            C．if                D．since
          


           
          

			
          
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          _________ we are young, we can still do something to help protect the environment．
          

          

          [　　]
          

          A．

          If
          

          

          B．

          Since
          

          

          C．

          Because
          

          

          D．

          Though
          

          

          

			
          
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          —When are you going to fly to Taiwan this summer?
          


          —_________ we finish school. It will be a great
holiday.
          


          A．Because          B．Since             C．Even though       D．Only if
          


           
          

			
          
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