—Another cup of coffee? That’s your third since lunch.
—Yeah, well, I ____ all night preparing for my history exam. I can hardly keep my eyes open.
A. stayed up B. have stayed up C. have been staying up D. will stay up
—Another cup of coffee? That’s your third since lunch.
—Yeah, well, I ____ all night preparing for my history exam. I can hardly keep my eyes open.
A. stayed up B. have stayed up C. have been staying up D. will stay up
A