The fiddle player in the underground passage answer

1 "I" wanted to help the piano player in the underground passage, but did not take action. I felt very guilty when I learned that his daughter died of leukemia.

2. (1) Qianqian is the helpless but stubborn politeness of a man.

(2) Feeling ashamed and ashamed, the author feels deeply guilty and sad.

3. Its foreshadowing effect is to set off the environment and create a rich atmosphere of pathos.

4. "I" always thought that standing here and listening to his playing for a while every day was the best reward for him, but I ignored the real material help.

5. Strong, stubborn, unyielding, and willing to give all his love for his daughter.