【正确答案】
Dear friends,
I am pleased to tell you the arrangement during your three-days' stay in our school. On Monday morning, our headmaster is to meet you and he will introduce our school to you. In the afternoon you will visit the teaching building, the library and the lab. On Tuesday morning, both the Chinese and English students are to visit the Great Wall, where a picnic will be held. In the evening, we are going to have a get-together in the classroom. The students will give wonderful performances. On Wednesday morning, we will have a talk with each other. In the afternoon, you will leave for Xian by train.