improve sales, to sell more things or services., a course lasts, how much time you need to finish a class., borrow money, to take money from a bank or a person and give it back later., become a pilot, to learn how to fly a plane as your job., very useful, helping you a lot to do or understand something, I hope, I want something good to happen., do a photography course, to study how to take beautiful photos., give good advice, to tell someone the best thing to do., to be a beginner, to just start learning or doing something new., It is fun, you enjoy it and it makes you happy., do the next level, to go to a higher and harder class after you finish one., repeat the course, to do the same class one more time.

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