If you ask Zhang Hua to join the school photography club.

I am writing to invite you to be the referee of the upcoming school debate, which will be held in the school conference hall at 10:00 next Thursday morning. The question is whether English skills are needed in today's society.

Present at the debate will be two principals of the school and some English teachers. As a judge, you need to wear a suit and tie, make a concluding speech after the debate and comment on the performance of the debater.

On behalf of the school, I would like to express my sincere thanks for your contribution. Thank you very much

You are sincere,