判断正(T)误(F)。 One afternoon some boys made a lot of noise in class. The teacher got angry. He kept them in the classroom after school. He told them to add all the numbers from 1 to 100 together. The boys took out their exercise-books. All of them began to write the numbers down except one boy. He was new in the school. He looked out of the window for a few minutes. Then he wrote a number in his exercise-book and put up his hand. 'May I go home, sir?' he asked. 'I know the answer now.' The teacher and the other boys were very surprised. 'Bring it here.' said the teacher. The next morning, the teacher asked the boy. 'How did you find the answer so quickly?' 'Well,sir.' He said, 'I did not want to stay here so long. So I did my best to find the answer quickly. Soon I found it. You see, if you add 100 to 1, you get 101, and 99 and 2 is 101, 98 and 3 is 101 too, and when you reach 51 and 50, you have 101 fifty times, that is 5050'. After this, when the teacher gave the class exercises to do, he gave this boy different exercise. The boy's name was Karl F.Gauss. When he grew up, he became a great scientist. (     )1. Little Gauss was a new student in that school. (     )2. Little Gauss and his classmates always listened to their teachers very carefully in class. (     )3. All the boys wrote the numbers from 1 to 100 down and added them up. (     )4. Little Gauss left the classroom much earlier than the other boys. (     )5. Little Gauss told the teacher how he found the answers so quickly the next day.