假如你是一名导游，陪同外宾游览长城，下车前用英语告诉外宾：

　　1、长城的长度、历史、世界奇观之一;

　　2、讲话时间是八点半，在长城停留两个小时，十点半离开。游览车在入口处等，请记住车牌号，准时上车;

　　3、随身带好贵重物品。

　　注意：字数100词左右。

　　[参考范文]

　　Ladies and gentlemen:

　　Here we are at the foot of the Great Wall. It’s the longest wall in the world and has a history of over 2000 years. It’s one of the wonders of the world. we will spend two hours on the wall. It’s 8:30 now. We’ll leave at 10:30. The bus will be waiting for us at the entrance. Please remember our bus number and be back on time. Besides, please take your valuable things with you and shut all the windows before getting off.

　　Have a good time! Thank you.