—Pity you missed the lecture on nuclear pollution. —I _____it, but I was busy preparing for a job interview.
His advice made me happy, but ____.
--- I hear Robert has gone to Harvard University for his master’s degree. --- Oh, how nice! Do you know when he ____?
--- Oh, must you? Stay a bit longer. ____.--- Thanks anyway. I’ve got an early start tomorrow morning.
It’s reported that a bus went out of ____ control on a highway ____ east of the city and crashed into a river.
When we sleep is cultural as biological-and practices differ greatly round the globe.