In what sentence is the underlined word a preposition?

Which of the following sentences contains the essential expression? a. we agreed of course that the party should be a surprise. b. mr. palmeri, our next-door neighbor, grows beautiful roses. c. jack, a football player, is trying for a scholarship. : d. the woman now approaching the microphone will introduce the speaker.

List some things u like to do with close friends(bff)

Do not use this medicine with milk, cheese, or other dairy products. what end punctuation needs to be added to the above bolded word?