Complete the sentences using the words this, that, these or those

Sure, here are some examples of how to complete sentences using the words "this", "that", "these", or "those":

1. Can you hand me this book from the shelf?
2. Look at that building across the street; it's the tallest one in the city.
3. These apples are ripe and ready to eat.
4. Do you remember those days when we used to play in the park?

Now, let's make some sentences that require one of the words to complete them:

1. Please put this document on my desk.
2. I don't think I'll need that umbrella if the forecast says it's going to be sunny.
3. These exercises are really helping me understand the material.
4. Those shoes you bought yesterday look very comfortable.

Remember, "this" and "these" refer to objects that are physically close to the speaker, or to events or situations currently being experienced or considered. "That" and "those" refer to objects that are farther away in space or time, or to events that are not currently happening or being considered.