完形填空（共15小题，每小题1分）。 Tom was twelve years old. His, Jenny, was two years younger he. One day their mother wanted them the house. Because they did very, their mother bought a delicious for them and said to Tom. “Tom, cut the cake two pieces, and give to your sister. Don’t that you must do like a brother.” “ a brother?” Tom asked. “How does a brother it?” “He always gives the piece to the other person,” answered_____ mother. “Oh, I see,” said Tom. He thought about it for minute, then he took the cake to his sister and said to_______, “Please cut the cake into ______ pieces, Jenny, and be a good sister.”