Dick was 7 years old, and his sister, Catherine, was 5. One day their mother took them to their aunt's house to play.
    , and then their aunt took Dick into the kitchen. She gave him a nice cake and a knife and said to him: "  . Cut this cake in half and give one of the pieces to your sister, but remember to do it like a gentleman（绅士）."
"Like a gentleman?" Dick asked. "  ?"
"They always give the bigger piece to the other person," answered his aunt.
"Oh" said Dick.    . Then he took the cake to his sister and said to her: "Cut this cake in half, Catherine."

A. How do gentlemen do it B. Now here's a knife, Dick C. Catherine cut the cake in half D. The children played for an hour E. He thought about this for a few seconds