Cách sử dụng
The expression "that's it" is often used to indicate that something has ended or that there is nothing left to be done or said. It can also be used to express agreement or satisfaction with something. For example, if you have finished a task, you might say "that's it, I'm done!" Or, if you are happy with a decision someone has made, you might say "that's it, you made the right choice." The expression can be used in both formal and informal situations, and is often said in a friendly or positive tone.