My lovely mother was a singer. Unfortunately,   31    her late twenties, she suffered from laryngitis, but she was    32    to keep working in order to support our family. Because of thiscondition, my mother’s voice would crack or suddenly   33   out in the middle of the performance. The audience would laugh and start booing. As her voice grew progressively worse, she could no longer rely on it.It was owing to her voice condition   34    I made my debut on the stage at the age of five. If my mother   35    laryngitis, I wouldn’t have begun my performing career at such an early age.
【題組】31.
(A)in
(B)at
(C) for
(D) with