Here's a sentence that I don't understand. There's nothing before this example. This is the first part of this paragraph.
Forgetting to take my ID with me to 'the' bank is something that I am definitely guilty of. One time I needed to make a bank transfer urgently for my company, but ~~.
I have no idea why 'the' is used in the first sentence. Isn't it more right way that I use 'a bank' because the bank have never mentioned before? How is it possible to use 'the' in the beginning of a sentence despite it being the first mention of the thing to the readers?