the reading room is open from 9.对时间提问

问题描述:

the reading room is open from 9.对时间提问

When is the reading room open ?

阅览室从八点到九点开门

对时间段提问,用疑问词When
所以
When is the reading room open?
阅览室什么时候开放?

When is the reading room open?不确定