which letter are the following sentences taken from?
A - a letter of complaint
B - a letter of application
C - a personal letter
D - a letter of advice


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1)It was definitely the best holiday I've ever had
2) I am writing to apply for the post of junior manager
3)We are very happy and we hope you and Martin will visit us soon
4)Well, that's all my new for now. Write back soon.
5)I am a patient, cheerful and organized.
6)I hope these suggestions will be of help to you.
7)I find this kind of service unacceptable.
8) I have enclosed a detailed CV as well as a reference letter from my previous employer.
9) I have studied English for six years.
10) I would like a refund or another game, otherwise there will be trouble.