please correct my composition
Corrected one:
Hello! My name is Grace, I'm a student in China. Last month ,I had to get through the exam “GaoKAO”and got a high mark. My final mark is 604 which can help me enter a great university. But what makes me confused is, why my English skills are that terrible that I can't talk with people who speak English, but I can do well in GAOKAO
Preferable one:
Hello every one!
My name is Grace, I'm a student in China. Last month ,I had to get through an exam called “GaoKAO” and got a high mark. My final mark was 604 which makes me able to enter a great university. But what makes me confused is, why my English speaking ability is so terrible when it comes to speaking English, but I can do that great in [an English test like] GAOKAO
Good Luck ;)