单项选择题
[听力原文]
M: How long does it take you to get to work
W: It’s only a 15-minute bus drive early in the morning. But coming home at the end of the day is quite different. Then it takes at least 20 to 30 minutes.
A.20 minutes.
B.15 minutes.
C.20 to 30minutes.
D.50 minutes.