______ does your cousin exercise? —Three times a week.

The plane will take off _______ three hours. I must get to the airport right now. [ ]

We have to get to the bus station ___________ 8 o’clock, or we’ll be late.[ ]

______is the computer?—Five thousand yuan. [ ]

It is the discovery of Cao Cao’s tomb, _____ was made in Anyang, Henan province, ____ has received widespread attention．