Once Einstein(爱因斯坦) travelled all over the United States and gave lectures(演讲) everywhere. He travelled by car and soon became friendly with the driver.
The driver a   listened to Einstein’s lecture. The lecture had been given again and again. One day, the driver told Einstein that he knew the lecture so w  that he was s    he could give it himself. Einstein smiled and said “Why don’t you try to give it instead?” The driver a    .
That evening they b   came to the lecture room. N    there had been given seen Einstein before. Then the driver began the lecture. Sure enough, he didn’t make any mistakes. The lecture was well done. When it was over, the p   claps lasted for a long time. When they were leaving, the driver shook hands(握手) with everybody, while Einstein was following him quietly b   .
Just before they got to the door, a man s     them and asked the driver a difficult question. The driver listened c   and pointed to(指向)Einstein. “The question is so simple that even my driver can answer it. You can ask him.”