[单项选择]

Passage One
It was a very happy family. The life was fairly well-off. Father, Leopold, was a music master in Austria. Mother was warm-hearted. There were two children, Marianne, a schoolgirl, and little Wolfgang, a child not quite four years old. Marianne was learning to play the piano, and day after day Leopold stood behind her as she practised. How patient her father was, and how cleverly he showed Maricanne how to play some particularly difficult pieces! She was making progress, very good progress, and that was excellent. And there, almost lost in the big chair, sat Wolfgang, who never had to be told to keep quiet when Marianne’s shoulder, saying she had done well. At that moment Wolfgang climbed on his father’s knee and begged to be allowed to play the pretty piece Marianne had now mastered. What a joke that was! Picking up his baby son, Leopold laughed and said," Look at your hands. You must wait, little man !"
There was no end of
A. he loved music
B. he liked his sister
C. he didn't want to make a noise
D. he didn't feel well