李华请根据以下提示用英语给你的外教huson写一封信邀请他作为演讲比赛的评委并请他在赛后给参赛学生指导如何演讲．nnoticenenglish-speech-contestntheme：opportunities-often-come-disguised-as-hard-workntime：16：30～18：0028-th--augustnplace：the-academic-hall

Dear Huson,

I hope this letter finds you well. As you know, our school will be holding an English Speech Contest on the 28th of August, with the theme "opportunities often come disguised as hard work". I would like to invite you to be one of the judges for the contest.

The contest will be held from 4:30 pm to 6:00 pm in the Academic Hall. Your expertise in English language and public speaking would be highly appreciated in evaluating the students' speeches. I believe your presence would greatly inspire and encourage the students to perform their best.

Furthermore, I would also like to request your assistance in guiding the students after the contest on how to improve their public speaking skills. Your advice and feedback would be invaluable in helping them become better speakers.

Please let me know if you are available for the event. Thank you for your time and consideration.

Best regards,

Li Hua