* These: If you're talking about things that are close to you, the opposite of "those" is "these."
* This: If you're talking about one thing that is close to you, the opposite of "those" is "this."
* These/this (but with a different meaning): If you're talking about a different group, "these" or "this" could be the opposite depending on how many things you are referring to.
* Other: If you want to express a general opposite, "other" can work. For example: "I don't like those shoes, I prefer other ones."
Can you give me an example sentence so I can give you a more precise answer?