In this task, you will be shown a conversation. You need to write a question with three choices for the conversation. Your question should be answerable based on the conversation and only have one correct answer. Note that you don't need to answer your question. "W" and "M" in the conversations stand for "woman" and "man".

W: We can have eight days off at last. What are you going to do? M: You know traveling is my hobby. Let's go to Beijing and have our holidays there. W: That's a good idea. Beijing is one of the most modern cities in the world. There are many places of interest there. And the 2008 Olympic Games were held there. M: How should we go there, by plane or by train? W: I think we should go there by train. It's comfortable and cheap. M: Though it's cheaper, it's slower. Let's go by plane. We can look down at the Great Wall of China from the plane. W: OK. Let's go by plane. M: Then we'd better book the tickets first. I have heard it is very difficult to get air tickets to Beijing. W: That's right. And we'd better book the rooms too.
How long is the speakers' holiday? (A) Eight days. (B) Seven days. (C) Five days.