Условие задания:

6 Б.
Complete the sentences using the answers or the verbs in the brackets. You have to decide where to use the future perfect or the future perfect continuous.
  
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1.   by Tuesday?
    Yes, she'll have returned by Tuesday.
 
2.  How many years  this year?
    They'll have been married for 10 years.
 
3.  When will you send the e-mail?  
    We  it by Thursday. (deliver)
 
4.  Can I have a look at your photos next time?  
    No, I'm sorry. I  them by then. (not develop)