Yes, by the way, how many books are used to learn from powerful countries? Why does it always show that it is finished? I'm ready in advance.
You can change six kinds of books at 8: 30 every Monday night, but I don't know how many. . Anyway, I saw many people say that they didn't grab it, but they will always redeem it ... I don't know what I dare to ask, but I still keep the exchange flow and book coupons, which is more sufficient.