Na moje oko powinno być:
advertisement nie advertisment
on last np. Monday
albo cale zdanie tak: I am writing in response to your advertisement which appeared in the yesterday's 'New Time'
nie: I have
tylko: I am 17....
nie: This advertised were interested me because I won't to work in future as journalist.
tylko I am interested in your advertisement, because in the future I would be work as a journalist.
nie: I think that I am a good person to this job. For a long time I am editing a school newspaper.
tylko: I think that I am a good person for this job because I have been written to a school magazine for a long time. This gave me a lot of experience.
nie: I could begin work from every day and any time.
tylko: The work I can start/begin for now, but I have one question: how much is the salary ?
nie: Can you give me quickly answer because if you don't give me this job I must look for something another. Could you send me list of documents, that I must delivered?
tylko: I would appreciate it if you would give me quick answer, failing I have to look for another job.
Could you please send me a list of documents, which I must deliver?
na końcu nie: heaving