求翻译：上周星期五，我给七年级的学生做了一次演讲。内容关于中国的文化和历史。刚开始我有点紧张，不过越来越流利。然后，我用了大量的时间讲了当年的中国，发展政策，已经经济发展是什么意思？

On Friday, I made a speech to the seventh grade students. About the Chinese culture and history. At first I was a little nervous, but more and more fluent. Then I use a lot of time speaking of China, the development of policy has been economic development

Last week, I gave to Friday grade 7 students to do a lecture. Content on China's culture and history. At first I was nervous, but increasingly fluent. And then, I have spent a lot of time talking about the time when the Chinese in the development of a policy that has economic development

Last week Friday, I gave seven grades the student has made a lecture.Content about China's culture and history.Just started mine to be a little anxious, but more and more fluent.Then, I used the massive time to speak the same year China, the development policy, already the economy developed

Last week Friday I for grade seven students made a presentation. Content about China's culture and history. At first I was nervous, but more and more fluent. Then, I spent a lot of time about the year of China, development policies have economic development

Next semester we all have to give our students make a speech