假如你是李夏。你看到关国留学生Sharon在网上发贴，希望有人能帮助她提高普通话(Mandarin)水平，她可以教英语作为回报。请银据以下提示用英语给她写一封电子邮件。
1.表达给她提供帮助的意愿;
2.说明你能胜任辅导的理由;
3.给出讲好普通话的两点建议;
4.提出你学习英语的具体需求。
注意：
1.词数120左右，开头语已为你写好;
2.可以适当增加细节，以使行文连贯;
3.文中不得透漏个人姓名和学校名称;
Hi Sharon,
This is Li Xia. I learned from your post that you want to improve your Mandarm__________
参考范文：
Dear Sam, Thank you for your concern.
It is now common knowledge that the College Entrance Examination is held on June 6 and 7 annually, as a national policy , during which，seven different subjects are tested depending on what you learn, science or art.
For me, Chinese, Math, English, Politics, History and Geography are included. Due to its great importance, every student in China would do his best to get ready for it, and I am no exception.
I spent a whole year reviewing all the subjects carefully until I thought I was fully prepared. Eventually, the day came. Nervous at first, but I did give the best form I could have (am now in the best form I have had) in years.
Frankly speaking, the papers were (are) not so hard for me despite some difficulty. Consequently, I have every right to believe that I shall be very likely to be admitted to my dreaming university. Just wish me good luck. Looking forward to your reply. Best wishes.