听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听第l段对话，回答第1—3题。
1．What's the possible relationship between the speakers?
A．Classmates.
B．Mother and son.
C．Teacher and student.
2．Why does the woman try to persuade the man to prepare for the exam?
A．Because Professor Johnson will get angry otherwise.
B．Because everyone should pass the exam.
C．Because the test will be difficult.
3．What does the man finally decide to do?
A．To study for the test.
B．To watch the football game.
C．To eat something before watching the game.
