The snow lasted until last Friday. I opened the window this morning and saw the sun but I felt much colder.

    “You'd better go to work on foot, dear,” said my husband, “It is dangerous for you to drive.”

    I thought him right and agreed. It would take me about forty minutes to get to my hospital. There was about an hour left, so I started, with a bag of sandwich for breakfast. In the streets there was thick snow and ice and the traffic was less than before and people walked carefully. Suddenly I saw a car going fast. The driver tried to pass the crossing before the lights turned red. Maybe he didn't see two boys in the middle of the street. His car knocked down one boy and stopped just in front of the police box.

    People crowded around the boy at once. I rushed out of the gathering crowd(聚集的人群) and was going to look him over. But a man pushed me aside and said, “Step back, please. I^'ve had a course in first aid.”

    I had to stand and watch his ministrations(救助) for a few minutes. Then I said to him, “When you need a doctor, sir, I'm already here.”

    How much do you know about Albert Einstein?

    Albert Einstein, born on March 14, 1879 in Germany, was a great scientist in the world. ①He was strange because he hated haircuts and new clothes. He believed in peace. All his life, he hated war. However, his most famous idea, E = mc², helped create the world's most dangerous weapon (武器). Many people think he was the smartest person in the world. But Einstein said that he thought like a child with many questions and unusual ideas.

    What did he like?

    Einstein liked learning sailing (帆船运动). He sailed in small boats all his life. He once joked, “Sailing is the sport that takes the least energy!” When Einstein was a child, his mother made him take violin lessons. At first, he didn't like the violin. But then he learned to love music and became a good violinist.

    Later, he said, “②热爱是最好的老师。”

    Why is the sky blue?

    In 1910, Einstein asked a question which many children often ask, “Why is the sky blue?” After his careful research, he answered the question like this: “It's because light is made up of many colors including blue. When light travels to Earth, gas particles (气体微粒) spread the blue light all over the sky.” His answer is true in physics.

    In a small village there lived a man. He would do nothing all day but daydream. Whenever he was hungry, he would go out, beg（乞讨）for food, come back and hang out.

    One sunny afternoon, the man was very hungry. With great difficulty, he got up, took out a pot（罐）and went out to beg. By begging the whole day, he finally got a pot of milk. He hung the pot on the ceiling（天花板）, lay down on his bed and started daydreaming again.

   "This pot of milk is going to make me rich, "he thought." I can make butter from the milk. Then I will be able to make ghee（印度酥油）and go to the market and sell the ghee." His dream continued, "With the money I get, I will buy a pair of cows. They will have baby cows. Soon I would have a large number of cows."

   "Then I will continue my business. I will buy come more cows and own a farm. And I will employ people to work on my farm. I can also open a candy shop. I will make candies out of the cows' milk, "the man kept smiling to himself.

   "I am so smart, "thought the man. Lost in his thoughts, he reached out his foot, breaking the pot. He saw the broken pot and cried. He lost whatever he had because he was lazy and spent his time daydreaming.

    The famous scientist and thinker, Charles Darwin, was born on February 12, 1809.As a boy, Charles liked to go for walks in the fields and forests. He enjoyed watching nature, and comparing what he saw with everything he had read in science books. He also liked collecting very much. He collected many things, such as birds, eggs, stones and leaves.

    At sixteen Darwin was sent to the University of Edinburgh to become a doctor. But he was interested in the history of nature.

    Then he was sent to study in the University of Cambridge. There he studied until 1831.

    Some time later he heard that the ship Beagle was going on a trip to South America and wanted a scientist. His teacher advised him to go. So when the Beagle left England in December, 1831, Darwin was on it.

    The trip lasted almost five years. Darwin saw many new plants and animals. He collected all kinds of plants.

    In 1842 Darwin went to live in Kent, and there he continued his studies of change in nature. Darwin understood that plants and animals are not always the same, and that they really change.

    By 1859 Darwin had finished his famous book The Origin of Species. It made a great hit in the world of science. He was opposed(反对)by the church and even by some scientists. But later, more and more scientists agreed with him.

    In1871 Darwin wrote another important book. Darwin continued his studies in science until he died in 1882.