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以前的中国，发展政策，以及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 spent a lot of time speaking of China, to develop policy and 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 spent a lot of time talking about the China of the past, and the development policies, as well as 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 beforehand China, the development policy, as well as economical development

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 before China, development policy, and economic development

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