你好! 我 叫吴明 夏，十五岁。 我是美国人。我在南小山 公园高中上十年级 我喜欢中国，  我喜欢中国的全部! 谢谢再见!

Ni hao! (In pinyin, characters, and English)

你好! (Ni hao! /Hello!) 我 叫吴明 夏。 (Wo jiao Wu Ming Xia. /My name is Wu Ming Xia.) 我是十五多。 (Wo shi wu sui. /I am fifteen years old.) 我是美国人。 (Wo shi mei guo ren. /I am American.) 我上南小山 公园高中。[I prefer 南崗公园] (Wo shang Nan Xiao Shan Gong Yuan Gao Jong. /I attend Park Hill South High School.) 我上十年级 [Although this is correct in everyway, we don't usuall express it in this way.  It would be more like "I'm a 10th grade pupil 我是十年級学生](Wo shang shi nian ji. /I attend tenth grade.) 我喜中文国的。 (Wo ai zhong guo de. /I love the Chinese language.) 我又喜中国起! (Wo ai zhong guo yiqi! /I love China all together!) 谢谢再见! (Xie xie zai jian! /Thank you and goodbye!)

For your info :)

中文 means Chinese language

漢文/語 also means Chinese language but is used to differentiate other languages that uses the Chinese script, eg Japanese in discussing in technical papers etc.

华文//語 = Chinese, often used by overseas Chinese especially those from South East Asia.

国語 = Chinese (Mandarin) used by Taiwanese Chinese.

Ni hao! (In pinyin, characters, and English)

你好! (Ni hao! /Hello!) 我 叫吴明 夏。 (Wo jiao Wu Ming Xia. /My name is Wu Ming Xia.) 我是十五岁多。 (Wo shi wu sui. /I am fifteen years old.) 我是美国人。 (Wo shi mei guo ren. /I am American.) 我上南小山 公园高中。 (Wo shang Nan Xiao Shan Gong Yuan Gao Jong. /I attend Park Hill South High School.) 我上十年级/(我现在十年级) (Wo shang shi nian ji. /I attend tenth grade.) 我喜欢中文的。 (Wo ai zhong guo de. /I love the Chinese language.) 我喜欢中国的全部! (Wo ai zhong guo yiqi! /I love China all together!) 谢谢再见! (Xie xie zai jian! /Thank you and goodbye!)

gooooooood job !! : )