Goodbye to the class

Hello,
Last time , our English class was over. I have studied writing in English since Octorber. I think my English writing skill improve, and I learned a lot of things from this class. I didn't know about topic sentence and supporting sentence when it was October. But now, I know how to write English pragraph and can write English essay. I want to be a doctor ,so in the future, when I will write or read English theses, I will recall this class. I think I should learn English more ,but this class was very useful for me. Thanks.for everything
Goodbye!