Student or Learner
The factory request us combined three orders in one LC. Please confirm whether the goods for PO xxx is kept May. If yes, we will open them are together to the factory, otherwise, please us your own LC for us to them
You will have to be clearer than this. Your sentence makes absolutely no sense at all. I can't even begin to help. Perhaps you could tell us what you want to say, and be clear about it. I suspect you're just asking someone else to do your homework (work).
For example, what do you mean by a PO and an LC, and what's happening in May? Etc, etc.