What does the man want to buy for his wife ？（）

单项选择题How often do the trains come at this time of the day ？（）

A．About every four minutes.
B．About every five minutes.
C．About every six minutes.
D．About every seven minutes.

单项选择题What’s the color the woman chooses ？（）

A．Black.
B．Brown.
C．White.
D．Gray.