You are right, the prepositional phrase in the sentence <em>Late last night there was a loud knock at the door </em>is D) at the door.
The only preposition in the sentence is <em>at, </em>therefore this has to be correct.
You're answer is that it's a fragment sentence. You would say, I plan to join the United States Navy because it can prepare me for a career as an electrician, and because I like ships and travel.
Answer:
balcony
Explanation:
a balcony is a platform enclosed by a wall outside of a building with access from an upper-floor door
Answer:
Alane jumped on her bike and then rode to the park.
Explanation:
