1.I'm sorry to hear that you are having trouble fitting in your new school.Such problems are quite normal.Perhaps the following suggestions are helpful.
2.I have received your letter saying you plan to play a visit to China for ten days next month.Perhaps the following suggestions are helpful to you.
3.I'm writing to you to present what I think on the further improvement of our hotel so as to attract more clients（顾客）.
4.You have asked me for my advice with regard to how to learn Chinese ，and I will try to make some suggestions here.
5.I'm very glad to receive your letter asking for my advice on how to fit in the new school life.Here are a few suggestions.
6.I'm very glad to have received your e-mail.Now I'm writing to give you some advice on how to learn English well in high school.
1.I'd like to suggest that...
2.In my opinion,...
3.If I were you，I would...
4.You'd better do.../not do...
5.It's necessary for you to read some books about these places before you come to see them with your own eyes.With more knowledge about these places，you will have a better understanding of Chinese history and culture.
6.First of all，you should listen to the teacher carefully and take notes in class so that you can go over your lessons as soon as you can after class.
7.As is known to all，vocabulary is of great importance.You should spend half an hour in the morning reciting words and reading texts aloud.
8.What’s more，try to communicate with your classmates in English out of class.Only in this way can you improve your listening and spoken English quickly.
9.Last but not least，you should develop the habit of keeping a diary，which helps improve your written English and helps you go over/review the words and expressions that you have learnt.
1.I hope these suggestions will be of use to you.Remember: where there is a will，there is a way(有志者事竟成).
2.I hope these suggestions will be of use to you.Remember: The man who has made up his mind to win will never say “impossible”(一个决心要成功的人从来不说“不可能”).
4.I hope that my suggestions are helpful for you anyway.I would be more than happy to see improvement.
5.I believe that you will take my suggestions into serious account.Whatever you decide to do，good luck with your studies/work！
6.I sincerely hope my advice will be some help for you.If there is more I can do to help，please let me know.
7.I hope you can take good consideration of my advice.I would be ready to discuss about this matter with you to further details.
8.I sincerely hope my advice will be some help for you.I'm eager to see you soon in Beijing.Wish you in advance a pleasant trip to Beijing.
自我介绍：i am li hua, coming from a middle school, which is the best education institution in my beautiful city.
感谢信：i am writing this letter to express my sincere gratitude for your help.
道歉信：i am writing this letter to express my apology for any inconvenience caused.
询问信：i am writing this letter to see if it is possible for you to provide me with some imformation which is very important to me.
建议信：i am writing this letter to make some conductive suggestions.
邀请信：i am writing this letter to invite you to come with us in an important issue.
请求信：i am writing to ask whether you can do me a favor.
what i want to stress in this letter is that ……
since it is (not)helpful， i suggest you doing sth.
as we all know, ……
it is important to do sth.
it should be a good idea to do sth.
by doing so, you will ……
here are a few suggestions.
it also helps to do sth.
it is a good opportunity for you to do ……
as for my suggestion, i think it’s better to do sth.
i was delighted to learn that ……
i would like to express my thanks to you for your advice.