----It’s a long time since I saw Kevin. What has happened to him?----Well, to tell you the truth, he _______ for nearly a month.
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.
Meeting my uncle after all these years was an unforgettable moment,_________ I will always treasure.