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          【題目】On average, there are 800 tornadoes in the US each year, _______ about 80 deaths and 1500 injuries.
          A.cause
          B.to cause
          C.caused
          D.causing
          

			
          

			
          
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          【題目】The Chinese scientists claimed _______ a cure for the disease．
          A. having discovered B. discovering
          C. to have discovered D. that they discover
          

			
          

			
          
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          【題目】Mr. Smith—our English teacher, is said ________ to England for holiday last week.
          A.to return
          B.returning
          C.to have returned
          D.having returned
          

			
          

			
          
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          【題目】He likes helping others, _______ those who are in trouble.
          A. in theory B. in favour
          C. in particular D. in practice
          

			
          

			
          
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          【題目】A quick review of successes and failures at the end of year will help _________your year ahead.
          A.shape
          B.switch
          C.stretch
          D.sharpen
          

			
          

			
          
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          【題目】Across the painting, we can see a horse running high speed like a missile across the sky.
          A.to
          B.on
          C.of
          D.at
          

			
          

			
          
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          【題目】If we  virtual reality holidays, we wouldn't have any problems with the weather.
          A.have
          B.have had
          C.had
          D.would have
          

			
          

			
          
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          【題目】The bell _______ the end of the period rang, interrupting our heated discussion.
          A. to indicate B. indicating
          C. indicates D. indicated
          

			
          

			
          
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          【題目】Experts believe that television  probably disappear in the future.
          A.must
          B.will
          C.need
          D.should
          

			
          

			
          
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          【題目】Millions of people all over China TV when the spaceship landed safely.
          A.were watching
          B.are watching
          C.watched
          D.have watched
          

			
          

			
          
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