These days, Grade 9 students stay up too late to finish ______homework and prepare for exams, as a result, some of them feel _________ the next day.

 ---Have you ____ cooked for your parents?   ---Yes, of course.

In the piano contest, my brother didn't play well and I did_

—Have you ___________ been to Beijing? —Yes. But only once.

---Excuse me , would you please speak a little more ____?---Sorry, I thought you could follow me.