Go sightseeing 观光旅游招待 A: What about visiting the Great Wall this weekend? The weather is great tomorrow. B: That's a good idea. C: Great. B: Could you introduce it for us? A: OK! The Great Wall is one of the wonders of the world. And nowadays it acts as not a defense against the offensive, but the precious historical relic which welcomes tourists from all over the world. And we'll know more about it through the guide's introduction. B: When will we get out tomorrow? A: How about 7 o'clock? C: That's OK.