Appear? I don't know a lot of things will fit in that sentence.
The answer would be "<span>Aiden is thrilled about starting a performance project on Romeo and Juliet, although he worries about getting assigned to a group of students who are poor actors." YOU'RE WELCOME :D
Sorry I took too long to answer :P</span>
Answer:
the speaker's not listening to the bird, because the bird isn't singing to him. At the same time, the speaker's also singing, which would make it difficult for him to listen to the bird even if the bird actually were singing to him.
Explanation:
I don't know the book that you are talking about so I can't tell you what and how the answer would be