问题
单项选择题
A．About every five minutes.
B．about every six minutes.
C．About every seven minutes.
D．About every eight minutes.
答案
参考答案：B
解析：[听力原文]
How often do the trains come
搜题请搜索小程序“爱下问搜题”
A．About every five minutes.
B．about every six minutes.
C．About every seven minutes.
D．About every eight minutes.
参考答案：B
解析：[听力原文]
How often do the trains come