are many people who think that dancing is a great way to get exercise and still have fun. Many dance teachers make videos you canto practice dancing in own home. Once you're learning the basics, much easier to learn more advanced moves.

The sentence means that dance teachers make videos people can purchase for practicing at home. “Buy” means to purchase something, so it fits the sentence. “By” can mean near or indicate who did something, and “bye” is a way to say farewell.

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