Choose the future perfect or the future perfect continuous.

1.  By the time dad gets to the airport, we ______ for over three hours!

• will have been waiting
• will have waited

2.  This time next month, I _____ here for an entire year.

• will have been working
• will have worked

3.  By the end of next week, Andrew ____ enough money to afford a new PC.

• will have saved
• will have been saving

4.  By the time our visitors from England come next week, we _____ construction on our new house.

• are going to have been finishing
• will have finished