题目内容：

短文改错

假定英语课课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每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：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，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限一词。

      2.只允许修改10处，多者（从第11处起）不计分。

I’m tiring. I’ve been digging all day and I’ll be doing same tomorrow. But I’ve never had so many fun. As an archaeology student, I have already knew something about the Qin Tomb. Most Chinese child can tell you Qin Shihuang first joined China together. He was a brilliant ruler, and he was also a cruel man. When he became king, he immediate ordered workers to construct an underground tomb, which it is said to contain great treasures. But the actual entrance to the tomb has ever been found, nor has the tomb been opened. It’s said that if everyone steps across the entrance, the crossbows will fire.