1, they are thoughtful, but poor
2, they knew what each other cherished and had gotten each other a gift to suit their passions, wisdom is the quality of having experience, knowledge, and good judgment
3, Jim got Della a set of hair brushes by selling his watch, and Della sold her hair to afford a chain for Jim’s watch, neither of them can use the gift for they had sold them to get the gifts.
I believe true , because the person reading the notes should be able to identify where each note came from.
Hope this helps ^_^
because he feels uncomfortable answering Lucy's questions. He does not want to offend or upset her.