The mall is open from 9:00 to 10:00.用how long 对吗
问题描述：
The mall is open from 9:00 to 10:00.用how long 对吗
答
问：How long is the mall open for?
答：The mall is open from 9:00 to 10:00
答
可以的，对时间段提问
答
How long is the mall open?