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96. John _____ there since the year before, so he ____ them.  
A. had worked…knew            B. had worked….had known    
C. worked…knew               D. worked…had known’ 97. He _____ angry because he _____ for a long time.  
A. had got…had waited    B. got…waited    C. had got…waited    D. got…had waited 98. Paper _____ first invented in China.  
A. is             B. are                 C. was              D. were 99. The Greens _____ China for five years.  
A. has been in     B. have been in           C. went to           D. has gone to 100.There _____ an eraser under the desk. Is it yours ?  
A. is              B. has                 C. was             D. had  |   
 
 
 
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