There are many, it mainly depends on what you like to listen to, tenor, soprano, baritone, mezzo-soprano, bass, chorus, duet, etc.
First of all, I recommend a few entry-level ones:
1. Bizet's "Carmen": "Habanera" (mezzo-soprano)
2. Romano Sidney's "The Barber of Seville": "I'm a busy man in the city" (Figaro aria) (baritone)
3. Puccini's "Giannis Ski" "Tosca": "Oh, my dear father" (soprano)
4. Puccini's "Tosca": "Tonight the stars are shining" (tenor)
5 , Puccini's "Tosca": "For art, for love!" (soprano)
6. Puccini's "Turandot": "Sleepless tonight" (tenor)
p>7. Puccini's "Madame Butterfly": "One Sunny Day" (soprano)
8. Verdi's "Aida": "Holy Aida" ( Tenor)
9. Verdi's "Trovatore": "Look! The night has opened" (Anvil Chorus)
10. Verdi's "Rigoletto" ": "The Fickle Woman" (tenor)
11. Borodin's "Prince Igor": Polovtsian Dances (Chorus)
12. Bailey Ni: "The Holy Goddess" in the opera "Norma" (soprano)
13. Gounod: "I Wish to Live in a Dream" in the opera "Romeo and Juliet" (duet)
< p>14. "Little Cold Hands" in Puccini's "La Bohème" (tenor)15. Verdi: "The Triumphant Return" of the opera "Aida" (soprano) )
16. Puccini: Opera "La Boheme" "My name is Mimi" (soprano)
17. Thomas: Opera "Mignon" "Tonight I am the Empress" (soprano)
18. Bellini: Opera "Sleepwalker" "Incredible" (soprano)
19. Gounod: Opera "Sleepwalker" Faust" "Jewelsong" (soprano)
20. Donizetti: Opera "Lucia di Lammermoor" "Surrounded by Loneliness" (soprano)
< p>........................There are many more. If you really like them, I will list them for you when I have time. shake hands!