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            • 1． The fire was finally brought under control，but extensive damage _________．（　　）
              A．is caused
              B．was causing
              C．had caused
              D．had been caused
              难度：中等
              解析 收藏 试题篮
            • 2． He collected information on 1,000 people, whose IQ ________ when they were ten years old.
              [     ]

              A. is tested  
              B. has tested
              C. would test  
              D. had been tested
              难度：中等
              解析 收藏 试题篮
            • 3． The coal miners________in the coal mine for 10 hours before we came to their rescue.
              [     ]

              A．had trapped  
              B．had been trapping
              C．had been trapped  
              D．would have been trapped
              难度：中等
              解析 收藏 试题篮
            • 4． July was feeling a little blue because her mother _________ from her job and she had lots of bills to pay.
              [      ]

              A. had laid off          
              B. has been laid off
              C. has laid off  
              D. had been laid off
              难度：中等
              解析 收藏 试题篮
            • 5．  Neither side was willing to give in at all. As a result, no agreement __________.
              [     ]

              A. was reached              
              B. has reached
              C. had reached              
              D. had been reached
              难度：中等
              解析 收藏 试题篮
            • 6． The manager entered the office and was happy to learn that four-fifths of the tickets ______.
              [     ]

              A. was booked    
              B. had been booked  
              C. were booked    
              D. have been booked
              难度：中等
              解析 收藏 试题篮
            • 7． The nine coal miners ________ in the coal mine for 20 hours before we came to their rescue in Yanshan
              County, Jiangxi Province.
              [     ]

              A. had trapped  
              B. had been trapping
              C. would have been trapped  
              D. had been trapped
              难度：中等
              解析 收藏 试题篮
            • 8． John had to have his car repaired in a garage because it ____seriously.
              [      ]

              A. damaged    
              B. was being damaged  
              C. had damaged    
              D. had been damaged
              难度：中等
              解析 收藏 试题篮
            • 9． Experiments of this kind ________ in both the U. S. and Europe well before the Second World War.
              [     ]

              A. have conducted  
              B. have been conducted
              C. had conducted  
              D. had been conducted
              难度：中等
              解析 收藏 试题篮
            • 10． He collected information on 1,000 people, whose IQ       when they were ten years old.
              [     ]

              A．is tested
              B．has tested
              C．would test
              D．had been tested
              难度：中等
              解析 收藏 试题篮
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