Thinking that the students were having anevening class, the teacher left the classroom, ______.

Are you coming to the Christmas party?— I’m not sure. I ____ go to the concert instead. [ ]

I failed to catch the early bus because I overslept this morning． —You_________have stayed up too late last night．

When I spoke English,people there always laughed_________me.

Is that your father—No. It’s my uncle, my mother’s _____.