Answers.

1.Ben Bolt.
2.Sweet Marie.
3.America.
4.Suanne River.
5.Maryland, My Maryland.
6.Comin' Through the Rye.
7.In the Gloaming.
8.Her Golden Hair was Hanging Down her Back.
9.Sweet Violets.
10.After the Ball.
11.Won't You Be My Sweetheart?
12.If you Ain't Got No Money You Needn't Come Around.
13.In Springtime, Gentle Anne.
14.Annie Laurie.
15.Warrior Bold.
16.While We Were Marching Through Georgia.
17.Marguerite.
18.Church Across The Way.
19.Streets of Cairo.
20.Home, Sweet Home.
21.The Man That Broke The Bank at Monte Carlo.

The answers to the above should not be arbitrary. There are many songs that afford quite as good answers as those given above, and the score should credit anyone that makes a reply which fits the question.