参考答案

正确答案：B
解析：W：Mary's been real busy．She has to get all her paintings from Johnson's class framed in time for the exhibition next week.
M：Didn't she know about the exhibition at the beginning of the term?
Q：What can be inferred about Mary?
四个选项的主语都是She，可以推测本题考查与说话人She相关，所以听音时要注意把握女士的话语。
女士说玛丽很忙，她得在下周的展览前把她在约翰老师的课上画的画都装裱起来。男士回应说难道她在开学之初不知道有画展的事情吗。言下之意是玛丽应当早做准备的。所以B)为正确答案。