GRAMMAR Future Perfect or Future Perfect Continuous. Write correct forms.
1. They build the airport by April.
2. I think we ... (launch) our new product by the end of December.
3. We ... decorate the Christmas tree before the children come back.
4. The speaker... (present his project for 4 hours by 6 o'clock.
5. By August the kids...
(stay) at the camp for a fortnight.
6. When I retire ... work, here for 30 years.
7. By 2020 we... (move to a new house.​

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