完形填空：

　Isaac Newton was 　1　  great English scientist, 　2　　　when he was thinking hard about his work, he often forgot 　3　　　 things.

　One morning Newton got up early. He began 　4　　 　at once. He worked on a very difficult problem. He was still thinking it hard when it was time 　5　　　breakfast, Mary brought a pan (平底锅) of water and an egg to his room. But Newton wanted to stay by 　6　　 　and said to Mary. "You can put the egg on the table. I'll boil (煮) it myself. Mary put the egg beside Newton's watch on the table and said, "You must boil the egg 　7　　 　 four minutes and then it will be ready." Then she went out of the room.

　But when she went into the room again an hour 　8　　　, she saw him 　9　　 　by the pan, and having the egg in his hand. He had put the watch in the pan and was boiling it! But he did not know 　10　　　he was doing.

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One afternoon just before Christmas, an old kind man was walking in the street when he saw a little boy crying   1.  a beautiful shop window. The old man asked why he was crying there. The little boy said that he lost the ten dollars given by his mother. When the old man heard this, he   2.  a small wallet and gave him what was inside. The little boy thanked him and stopped crying and smiled. The man  3.  .

An hour later, the old man was returning home by the route. To his surprise, he saw the boy at the same place. He went up to him and asked if he had lost his money again. The little boy said that he had found the lost ten dollars. He   4.  him there. He wanted to  5.   the ten dollars to him.