[听力原文]
M: Henry has four classes on Wednesday and Peter has three.
W: I only have two, but I have five on Thursday.

How many classes does the woman have on Wednesday（）

A．the repeated occurrence of insomnia
B．the worry about less time for sleep
C．the difficulty in changing it
D．the tiredness from the insomnia

A．students learn how to use dictionaries
B．students improve their expression in writing
C．teachers know the progress of students’ writing
D．teachers pay attention to students’ writing errors