文中共有10处语文错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：在错的词下面一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

      2）只允许修改10处，多者（从第11处起）不计分。

    Last Sunday, I showed Tom, the friend from the USA, around the city. This was the first time that Tom visited my hometown, and he found the trip excited.

Early in the morning, I took her to the park near my home. He was astonished to seeing so many people did exercise in the park. Then, we went to the museum. From the exhibitions, he learned a lot at the history of the city. After leaving the museum, we went downtown and found it was crowded with quite a lot of building. On our way to home, Tom said he was really amazed by that he found. But he hoped that he would have chances to come here again.

He lives in China Chengdu.

两宋时期经济重心南移的原因和表现。