At the meeting he didn’t _______ well, so everyone was in a puzzle about his idea.

—Have you ________?—No. I had the wrong number.

She ___ for the professor who was ill.

 Mrs.Smith finds it hard to clear up the mess, as her children are always ________ whenever she tries to.

—When did you      staying up so late?—When I entered this school two years ago, where students have too much homework to do.