听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给出的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5秒钟的时间阅读各个小题；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。 When will Linda see Lee

A．/
B．but
C．so
D．when

[A] Because he will go back to England. [B] Because his son will go back to England. [C] Because he is concerned about his son’s studies.