单选题 根据下面短文回答下列问题。
Once there was a man who had two children, a boy and a girl. The boy was good looking, but the girl was not.
One day they found a mirror and for the first time, they saw what they looked like. The boy was very pleased. He said to his sister, "How handsome I am! I look much nicer than you!" The girl did not like what he said. She gave her brother a push and said, "Go away!"
Their father saw what was happening and said to the boy. "You must always be as good as you look."
And to the girl he said, "My dear, if you help everyone and be kind to everyone, you will be loved. Our looks don't mean anything./

单选题 The boy and the girl didn't know what they looked like until ______.
A. the father told them
B. people told them
C. they saw themselves in the mirror

单选题 The girl gave the boy a push because ______.
A. she herself was not good-looking
B. the boy was handsome
C. what the boy said made her angry

单选题 Where did the story take place?
A. It took place in America.
B. The story didn't tell us.
C. It took place in China.