单项选择题

A．Once a week.
B．Twice a week.
C．Once a month.
D．Twice a month.
<上一题 目录 下一题>
热门 试题

填空题
focused
单项选择题
A．Every ten minutes.B．At twenty to one.C．Every half-hour.D．Once a day.
A．Every ten minutes.
B．At twenty to one.
C．Every half-hour.
D．Once a day.
相关试题