What theme does this event from “The Necklace” support? Why, darling, I thought you'd be pleased. You never go out, and this is a great occasion. I had tremendous trouble to get it. Everyone wants one; it's very select, and very few go to the clerks. You'll see all the really big people there."

She looked at him out of furious eyes, and said impatiently: "And what do you suppose I am to wear at such an affair?"

Married life is more difficult than most people think.

Unhappy people are never satisfied.

Parties and high society are more trouble than they're worth.

The bonds of true love and friendship will never fade.

Unhappy people are never satisfied.

Explanation:

According to the given excerpt from "The Necklace", there's a conversation between two people who I assume to be a couple. From their discussion, the man got her a piece of clothing that he went to great trouble to get so she could wear it for a party but she was not pleased and spoke angrily to him.

Based on this, the theme that it likely supports is that unhappy people are never satisfied.

 Below, the bold words indicate prepositional phrases. Only these sentences contain prepositional phrases  

The man in the house seemed to be asleep.

The soldiers crept cautiously through the tunnel.  

I was informed that the bus would arrive in 45 minutes.

Explanation:

Prepositions are connecting words that act like bridges (For example with, after, in, to, between, around, beneath, under etc) . Preposition can show things like time place and movement. A prepositional phrase is a group of words that beings with a preposition and ends with the object of the preposition.