When the teacher comes, we all stop _______ and do our homework?
I thought my deskmate would be________for class,but he was late again.
My mother kept working for 12 hours.Now she is________and needs a good rest.
—How long have Mr and Mrs Green________? —For more than thirty years.
—Why didn’t Sam________at the party?He said he would come. —It seemed that he overslept.
—What happened to John?He looks unhappy. —He wanted to play a________on his deskmate,but he fooled himself at last.