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Dear Sir / Madam
I am writing in response to your advertisement which was published in "Rzeczpospolita" on Thursday, connected with a job offer. I would like to apply for the position of babysitter.

After graduating High School I begun my studies at the faculty of Psychology at University of Adam Mickiewicz. I have been working as a babysitter in Scotland for 1 year. I know a lot about Child Psychology and this knowledge helps me understand children better. I give an impression of reliability and friendliness. One year of working as a Au pair allow me learn how to be patient.

I hold FCE certificate and I have been in England for 2 years so I speak English fluently. I will be able to communicate with children.
I look forward to hearing from you soon.

yours faithfully

XYZ

I am writing in response to your advertisement RELATING TO A JOB OFFER which was published in "Rzeczpospolita" on Thursday. I would like to apply for the position of babysitter.

After graduating High School (czy to jest "proper noun"?) I begAn my studies at the faculty of Psychology at THE University of Adam Mickiewicz IN ??. I have been working as a babysitter in Scotland for 1 year. I know a lot about Child Psychology ("proper noun"?) and this knowledge helps me understand children better. I (give an impression...kalka z polskiego?...lepiej I am a reliable and friendly person (who makes a great first impression)) . One year of working as a?? Au?? pair [allowS me To learn ...po pracuj nad tym troche, troche nie zgrabne] how to be patient.

I hold a FCE certificate and I have (been...lepiej LIVED) in England for 2 years, so I speak English fluently. I (will be able to...nie podoba mi sie, lepiej CAN) communicate with children (easily?, effectively?).
I look forward to hearing from you soon.