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           I think you must be mistaken about seeing him at the theatre; I’m sure he _____ abroad all week. 
            
          A. is                B. was
            
          C. has been      D. had been
          

			
          
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          I think you must be mistaken about seeing him at the theatre; I’m sure he       abroad all week.
            
            A. is    B. was    C. has been   D. had been
          

			
          
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            I think you must be mistaken about seeing him at the theatre; I’m sure he _____ abroad all week.
            
          A. is                  B. was             C. has been                 D. had been
          

			
          
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            I think you must be mistaken about seeing him at the theatre; I’m sure he ______ abroad all week.
            
             A. is    B. was    C. has been   D. had been
          

			
          
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          . I think you must be mistaken about seeing him at the theatre; I’m sure he _____ abroad all week. 
            
          A. is        B. was  C. has been     D. had been
          

			
          
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