The man is talking to our teacher is Betty’s father.
——Susan has never been to Beijing, ________? ——________, she went there with her parents last month.
——Will you come to the dinner party? ——I won’t come unless Mary ________.
——Mary stays alone in the classroom and looks sad. ——________ to her?
—— ________ have you been away from your hometown, Janet? ——Since 5 years ago.
——What do you want to ________ if you are in the university? ——Physics.