证呢?多久能办下来呢?
It would be the same as applying for Canadian visitor's visas. Go to the consulate's website. They have a comprehensive package there.
多久能办下来呢?
Check the website. They have a list of the current processing days at each consulate. It may take anywhere from a week to several months, depending on your case.
可是我们都处于AOS阶段,用EAD。
You better call the consulate and ask about your case. They should be able to tell you what to do.
要是来不及办下来能不下船吗?
NO. They will not let you board the cruise ship.