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?

Writing about thing people usually do

Boss: oh no! that’s the phone again! secretary: blank boss: . a. shall i take it? b. will you answer it? c. can you do me a favor? d. may i hang it up?

Alberto is reading a myth. he wants to learn about the cultural context of the myth-tellers. to do so, he will write a question about each of the four aspects of cultural context. he has written the following question: what kinds of ceremonies or celebrations did the people of this culture practice? which aspect of cultural context does the question address? lifestyle setting customs values