1 I saw/ read your advertisement in..
2 The reason for this letter
3 with regards to
4 to apply for
5 my strengths
6 my English is fluent/ advanced/ I'm near-native in English
7 experience
8
8 certificates
9 currently
10 available
11 (job)interview
12 I'm looking forward to your response
13 I have enclosed a copy of my resume