“Would you prefer a wool sweater or a cotton one?” This presupposes that the listener wants one of them. The question is which. It’s better than asking “do you want one?” of which it can be easy to answer “no!”
“Would you prefer a wool sweater or a cotton one?” This presupposes that the listener wants one of them. The question is which. It’s better than asking “do you want one?” of which it can be easy to answer “no!”