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            • 1． All possible means ____, but nothing can prevent the buildings ____.
              [    ]

              A. has tried; from being pulled down    
              B. have tried; from pulling down
              C. has been tried; from pulling down          
              D. have been tried; from being pulled down
              难度：中等
              解析 收藏 试题篮
            • 2． The famous writer and editor of the newspaper as well as many reporters _________ to the quake-hit
              villages to cover the post-quake relief.
              [     ]

              A. has been sent  
              B. have sent    
              C. has sent    
              D. have been sent
              难度：中等
              解析 收藏 试题篮
            • 3． Steven ________ since he got out of work three weeks ago.
              [     ]

              A. has been unemployed
              B. was unemployed
              C. had been unemployed
              D. has unemployed
              难度：中等
              解析 收藏 试题篮
            • 4． Two fifths of the highway________so far.
              [      ]

              A. has been completed  
              B. was completed
              C. have been completed  
              D. has completed
              难度：中等
              解析 收藏 试题篮
            • 5． All the preparations for the task ___,and we're ready to start.    
              [      ]

              A. completed                      
              B. complete    
              C. had been completed              
              D. have been completed
              难度：中等
              解析 收藏 试题篮
            • 6． —Mom, today I received a message telling me to send money to the account.
              —Delete it. It's a trick. Many a person ________ by such tricks.
              [     ]

              A. have been cheated              
              B. were cheated
              C. has been cheated              
              D. was cheated
              难度：中等
              解析 收藏 试题篮
            • 7． Creat as Newton was, many of his ideas        today and are being modified by the work of scientists of
              our time.    
              [     ]

              A.   have challenged        
              B.   have been challenged    
              C．have questioned      
              D.   have been questioning
              难度：中等
              解析 收藏 试题篮
            • 8． The construction of the two new railway lines       __by now.    
              [     ]

              A．has completed    
              B．have completed    
              C．have been completed    
              D．has been completed

            难度：中等
            解析 收藏 试题篮
          • 9． When you get the paper back, pay special attention to what          .     
            [     ]

            A. have marked                
            B. have been marked      
            C. had marked                
            D. had been marked
            难度：中等
            解析 收藏 试题篮
          • 10． - Why does the lake smell terrible?
            - Because large quantities of water  ________ .             
            [     ]

            A. have polluted    
            B. is being polluted    
            C. has been polluted    
            D. have been polluted
            难度：中等
            解析 收藏 试题篮
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