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Closing remarks are generally made in closing of a speech. They usually include giving credit to whomever has helped you get to where you are. Ideas for closing remarks http://portfolio.washington.edu/catres/e...
Then again, this answer might help you...
Closing remarks are generally a review of the most important topics or parts of a speech. You could say something like: "In closing I would just like to remind you that" and then touch on the highlights.

