Future Perfect Continuous vs. Future Perfect

By the time the CEO finally arrives for the board meeting, the frustrated directors ___ for over two hours.

At the end of this fiscal year, our research team ___ the efficacy of this new compound for exactly a decade.

I hope that by the time I retire, I ___ enough money to travel the world comfortably.

By next Tuesday, the construction crew ___ the entire north wing of the hospital.

Come December, the lead scientist ___ this project for five years, but she hasn't published her findings yet.

How long ___ English by the time you sit for the C2 Proficiency exam next year?

By the time the symphony ends, the principal violinist ___ for nearly ninety minutes without a break.

By the time the new regulations are implemented, most companies ___ their systems to comply with the law.

If the rain continues like this, the basement ___ for three days straight by tomorrow morning.

By the end of the semester, the students ___ ten chapters of the textbook.

Next month marks our silver anniversary; we ___ together for twenty-five years.

By the time the delegates reach a consensus, they ___ the finer points of the treaty for weeks.

By 2030, the government ___ its carbon emissions by 40% according to the latest projections.

If he doesn't slow down, he ___ for six hours without stopping by the time he reaches the border.

By the time the play opens next week, the actors ___ the script so many times they could recite it in their sleep.