阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。
There is a woman in Detroit, who has two sons. She is worried about them, especially the younger one, Ben, 1he isn't good at study. Boys in his class often make jokes on him, because he isn't 2. The mother decides that she will make her sons do better at school. She 3them to go to the Detroit Public Library to read a 4 every week and give her a report about the book.
One day, the teacher holds up a rock (石头) and asks if anyone knows it. 5knows it, but Ben puts up his hand and the teacher lets him speak. "Why does Ben put up his hand?" Others think, "He 6says anything in class. What is he going to say?"
Well, Ben knows the 7of the rock, and he also says a lot about it. He even knows 8the teacher finds it. The teacher and his 9are very surprised. Ben knows all these 10doing book reports, and later he becomes a top student in his class.
After Ben grows up, he finds something about his mother that he doesn't know as a child. His mother doesn't know how to read.
