1. He said that honesty _____the key to success.               
A. was        B. will be     C. is          D. is being
2. She _____in London till nest Monday.  
A. will have stayed            B. has stayed      
C. is staying                    D. has been staying
3. We _____each other since I left Shanghai.        
A. haven’t seen     B. hadn’t seen        
C. didn’t see           D. wouldn’t see