‘你知道中国的邮局每天什么时候关门吗？’这句话英语口语怎样说？

Do you know when China's post offices close?

Do you know when the post office close everyday?

Do you know when the Postoffices in China close everyday?

do you know what time does the post office off duty?
这样好像不太好, 最好说成

do you know the working hour of the post office?

你知道邮局的营业时间吗?

Do you know in China when post offices are supposed to close?

Do you know when Chinese post office close everyday?

我也不太懂。