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


		
           
          


		
          
		
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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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          Bob spends lots of money ________ he is not rich．
          

          

          [　　]
          

          A．if
          

          

          B．though
          

          

          C．since
          

          

          D．because
          

          

          

			
          
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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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           -- May I go to the concert with you?
          -- I’m afraid not ____ you have a ticket, because I have only one.
          A．since B．if 
          C．unless D．though 
          

			
          
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