I don't think it __________ to stay up late in the night and sleep until midday the next day.
If you ________ go, at least wait until the storm is over.
It _________ be the postman at the door. It’s only six o’clock.
I got close enough to hear them speaking Chinese, and I said “Ni Hao”, just as I ________ do in China.
—Why are your eyes so red? You ________ have slept well last night?—Yeah, I stayed up late writing a report.
When I was a child, I ________ watch TV whenever I wanted to.