—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

— Tom works hard at English.

— ______, and ______. [ ]

A.So does he; so you do

B.So you do; so is he

C.So he will; so do you

D.So he does; so do you