ispeak是一家英语学习网站假定你是李华请根据以下要点用英语给你的好友王俊凯写一封信 向他介绍

Hi, Dear Wang Jun
I found a good website for English study. Let me introduce it to you.
It is a site offering oral English service. every student will be assigned a teacher who is a real people personally. all the teachers are foreign teacher with English as their native language.
High quality with amazingly low price which starts from RMB 15 per lesson lasting for half an hour. basically you can choose any time as the start time for your course unless all the teachers are busy, but that will hardly happen.
the url of the website is "iSpeak"
I know that you have many friends interested in studying English. help me to do some advertisement. thank you.
Yours, Li Hua, 2014/10/30