Just like the opening sentence of a cover letter, its last sentence is also extremely important. After having read the cover letter, its recipient must get a positive impression of you, and the very last sentence must once again confirm the positive impression that was already formed. For example, if you’ve written a good letter and it has left a positive impression, then the last sentence has to reinforce that good impression. So, when writing a cover letter, you must reflect carefully not only on its opening sentence, but on its closing one as well.