By the time he arrives in Beijing, we_______________here for two days.
[     ]

A. will have stayed    
B. have been staying    
C. shall stay    
D. have stayed

By the time Jane gets home,her aunt _____ for London to attend a meeting.
[     ]
A.will leave
B.leaves
C.will have left
D.left
By the time you have completed the essential training, you _____ exposed to virtually every new
feature of the course.
[     ]
A. are
B. will have been
C. have been
D. will be
— Can I have a talk with you at about 4 this afternoon,Mr Black?
— All right,I ________ from a conference by then.I will be waiting for you.
[      ]

A. will have come back  
B. will come back
C. have come back
D. will be coming back

— Could you meet me at the airport?
— I'd like to, but I ________ Shanghai when you return.
[     ]
A. will have left  
B. was leaving
C. will leave  
D. have left
The mayor of Beijing says that all construction work for the Beijing Olympics __ by the end of 2007.      
[     ]
A. has been completed      
B. has come to an end      
C. will have come to an end      
D.will have completed
— Tommy is planning to buy a car.    
— I know. By next month, he   enough for a used one.    
[     ]
A. saves        
B. saved  
C. will save      
D. will have saved
By the time you come back，your aunt________for Nanjing to attend a meeting.
[     ]
A．will leave
B．leaves
C．will have left
D．left
—  I hear that Jason is planning to buy a car.  
— I know. By next month, he _       enough for a used one.
[     ]
A. will have saved   
B. will be saving    
C. has saved        
D. saves
You_____ the results of the experiment by next day.      
[     ]
A. would have learnt    
B. have learnt    
C. will learn  
D. will have learnt
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