①经常阅读课外书，能够丰富和提高阅读能力。（修改病句）

②这是非常宝贵的人生道理，我们应该牢牢记住。（改反问句）

③凡卡写信。（扩句）

    Mrs. Yuan is a writer. She's 1 and often helps the poor person. It was very cold one snowy morning. On the way to her office, she saw an old man 2 on the ground. She came to him and help him to 3 and bought some porridge and bread for him. The old man ate up the food quickly and  4 her very much. Then she asked. “Where do you live, Grandpa?”

     “I have no  5  madam,” said the old man. “ I have to sleep outside 6.”

     “How old are you?” “Ninety-two.” Mrs Yuan became 7 and went on asking, “Why not live in the old people's house?”  8 I have a son,” said the old man. “they've 9 admitted(接纳) a person who has children.”

     “Do you have any children?”

     “Yes,” answered the old man. “I have a son.”

     “Where is your son, then?”

     “He has no children, 10 the old people's house admitted him.”

     “It's unfair!” said Mrs. Yuan. She overcame several difficulties and at last helped him to live in the old people's house.

A

    Nick, 13, is tall and strong. He is good at running. Two weeks ago a new student came. His name is David. He is thin and short. He plays soccer well, and he can run very fast. Larry told Nick about it. Of course, Nick did not believe it.

    “Why not have a race with him?” said Larry.

    “Good idea!” said Nick. “I'll have a race with him after school.”

    After school, Nick went to the playground. He did some warm-up exercises for half an hour, and got ready for the race. He was sure that he could win it. Larry had to take part in a club activity that afternoon, so he could not watch the race between Nick and David.

    That evening Larry went to see Nick. They began to talk about the afternoon race. Nick's grandmother heard them in the next room. She came in and asked, “Which place?”

    “The second place,” answered Nick.

    His grandmother was very happy to hear that, and asked, “Which place did David win, then?”

    “The last but one.”

用数学的方式理解“两岸猿声啼不住，轻舟已过万重山”和“坐地日行八万里”（只考虑地球的自转），其中蕴含的图形运动是（　　）