单项选择题
A．Twenty dollars. B．Twenty-five dollars. C．Forty dollar……
[听力原文]
M: How much are these sweaters
W. They are on sale today, sir. Twenty-five dollars each, or two for forty dollars,
How much does one sweater cost（）
A．Twenty dollars.
B．Twenty-five dollars.
C．Forty dollars.
D．Fifty dollars.
