Условие задания:

4 Б.
Choose the future perfect or the future perfect continuous.
  
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1.  By the time dad gets to the airport, we ______ for over three hours!
    
 
 
2.  This time next month, I _____ here for an entire year.
    
 
3.  By the end of next week, Andrew ____ enough money to afford a new PC.
    
 
4.  By the time our visitors from England come next week, we _____ construction on our new house.
    
Источники:
ec.europa.eu