单项选择题
[听力原文] W: Why don’ t you go to bed M: I have to finish this homework first.
A．He has to finish his home work. B．He doesn’ t know it is very late. C．His mother wants him to do homework. D．He can’t sleep.
A．Linda’ s mother. B．Linda’ s cousin. C．Linda’ s aunt. D．Linda’ s sister.