Question

Which sentence must be revised to eliminate the preposition at the end?

If no one answers the door, then please let yourself in.
The top steps are fine, but be careful of the slippery stairs below.
Where are Katelyn and Ella walking to?
Do you know what Naveen was talking about?

Answer 1

The sentence that must be revised to eliminate the preposition at the end is:

"Where are Katelyn and Ella walking to?"

It can be revised to: "Where are Katelyn and Ella walking?"