Isaac Newton, the great British （science）, is often so deep in his thoughts that he will forget to eat his dinner.
One day a friend of （him）came to have dinner with him. Dinner was put on the table but Newton didn't come out of his study（书房）. His friend sat down and waited for him. After （wait）for quite a long time, he thought that Newton must be so deep in some new theory he forgot all about the dinner. So he began to eat the chicken Newton.
When he finished, he thought he would play a joke on his friend. He put all the chicken bones back on the dish and covered them with the dish cover. Then he left Newton's house. He was quite （certainly）that his joke would work.
Several hours （late）, Newton came out of his study, feeling very hungry. He saw the table was ready for dinner and so he sat down. he lifted the cover and saw the bones of the chicken, he was greatly （surprise）. He turned, looked at the clock, and saw that it was long past his usual time for dinner.
"Well, well," he said to himself, "I thought I （eat）nothing, but I am wrong." He got up from table and went back to his study and began to work again.
