Dear Humffman:
This is Hua Li, one of the Organizers of World Economic Forum. We sincerely invite you to give a one-hour speech and answer some questions for audiences at Beijing National Science and Technology Park at 12nd of April 2013. We would be very pleased if you could attend.
Hope hear from you soon.

Yours sincerely,Hua Li.

请帮我想个比较有意思的英文讨论的话题

Meida Voilence
Animal Testing/Animal Rights
Cloning/T-Cell Research/Genetic Research
Global Warming/Environmental Crisis
Capital Punishment
Euthanasia
Gangs(Positive/Negative aspects)
Censorship
Gambling~recreation or addiction?


哈哈 我们老师留的作业中的论文题目（我再作Animal testing)
找资料去http://en.wikipedia.org/
查单词去dict.cn