科举，就是由封建国家设立科目，定期举行统一考试，通过考试来选拔官吏。下列事件中标志着科举制度正式诞生的是（　　）

24平方米＝240平方分米

阅读下面短文，简要回答所给问题。

    Today is Monday. The weather is fine, it is sunny all day. I had a busy day. In the morning, I went to school to learn Chinese. After school, I played basketball with my classmates and it made me feel happy because it was great fun! In the afternoon, I went for a walk with my good friend Lily. We went shopping on the way, We bought a lot of food, it was delicious. And I like hot food. I also bought some hot food. I loved the food very much. In the evening, I played tennis with my little brother. He was lovely, I didn't do my homework that day. We had dinner at home, My mother cooked for me. I had a good weekend today. Oh, my name is Bob.

Are you still here？ You ______ home hours ago.

假定英语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仅限一词；
2）只允许修改10处，多者（从第11处起）不计分。
    Last summer I go to America and studied at a language school. I had many wonderful experience, but I also had a sad one. One day, the school held party , where I invited to talk about Chongqing. After that they asked me a lot of things about China. But I couldn't explain them with English clearly. I felt sadly. I learned a lesson from this experience. I have already studied English for eight years, I can't use it very good. I must work hard to improve my spoken English so that I will not be able to communicate freely with foreigners. I hope I can be a bridge between China and others countries in the future.