帮我写一篇英语作文，急。假定你是李华，正在英国一所学校语言课程，你的笔友Tom邀请你下周五去他们学...

Hi Tom,

I am very sorry to tell you that I can‘t attend your school's cultural exchange publicity week activity next Friday. Because I have a English speech contest that day and it's very important to me.

I asked may classmate Zhao Qing to be there and give the keynote speech. I wish you can understand me.

Warm regards

Li Hua

dear tom:
i am very sorry but i cannot make the time to do the speech for your school's culture week due to personal reasons. However, i think my classmate Zhao Qing would be a perfect replacement for me. please do understand and hope eveything go well.

regards
LI Hua