Once upon a time, a wealthy villager hid a huge piece of gold in a nearby rice field to protect it from robbers（强盗）.

 Many years later, the wealthy man died and no one else knew about the gold. One day , a poor farmer began to plough（犁）the field. After ploughing for some time, his plough struck（碰、撞）the long forgotten treasure.

    At first, he thought it must be a very hard tree root. However, when he went closer to look, he saw that it was a large piece of beautiful shining gold.

    Waiting until midnight, the farmer started to take the gold home. He tried to lift the gold but it was too heavy. He tried to pull it out with ropes, but it was so huge that he could hardly move it. He became frustrated and thought how lucky he was to have found treasure, but unlucky too, as he could not move it. He even tried kicking the gold but it would not budge!

    He sat down and began to use his head. He decided to break the gold into smaller pieces. This would enable him to carry the gold easily.

He thought to himself, “ I will use one part for my daily needs, I will save the second part for a rainy day. I will invest（投资）the third part in my farming business. I will use the fourth part to help the poor and needy.”

    Follow this, he calmly divided the huge piece of gold into smaller pieces. Finally, he took all the gold home easily and lived happily ever after.

    Mr. Brown is 80 years old. Every morning he goes for a walk in the park. And he comes home at half past twelve for lunch. But today a car stops at his house at twelve. Two policemen help him get out. One of them says to Mr. Brown's daughter. “The old man can't find his way home in the park, so we bring him back” The daughter thanks the policemen. Then she asks her father, “Dad , you go to that park every day. But today, you can't find the way. What's wrong with you（你怎么了）?” The old man smiles（笑） like a child and says, “I can find my way. But I don't want to walk home.”

    What was discovered by accident? The answer is penicillin (青霉素). It kills germs. By killing germs, it saves lives. Suppose you are sick. You go to a doctor. She examines you. She says you have a “staph” infection (葡萄球菌感染). She gives you some medicine. You take it. The medicine knocks out the staph. Soon you are well. Before penicillin, this would not happen. Staph was almost sure death.

    Everyone wanted a medicine. Laboratories worked day and night. They grew the staph in small dishes. Then they tried to kill it. Nothing worked.

    The laboratory dishes had covers on them. They kept things from falling into dishes. Molds (霉菌) were a big worry. They are always in the air. You can't see them. They're too small. There are thousands of different molds. Molds can make an experiment (实验) fail. That's why dishes are covered.

    Dr. Alexander Fleming was working to kill the staph germ. He worked for years. One day he took a cover off a dish. He looked inside. There was a thick growth of staph germ. There was also some mold. Then he saw something strange. Where the mold was, there was no growth of staph. This is what Fleming probably thought. “By accident, I found a mold to kill the dreaded staph.”

    This is how penicillin was found. But here's the real miracle (奇迹). There are thousands of kinds of molds. But only one kind can kill staph. The mold must have fallen into the dish a few days before. The cover was probably off only a few seconds (秒). In those few seconds the right mold fell into the right dish. Another man might have thrown the dish away. But Fleming was very careful and smart. He understood what the mold did. How lucky the humans were!

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    You may have heard of people who are allergic (过敏) to seafood, smoke or pets. But did you know that some people were allergic to Wi-Fi signals(信号)?

    Rose White, a 44-year-old woman from Britain, first found herself being allergic to Wi-Fi signals in 2015. She had a cough, heart trouble and great pains in her head when she stayed at the places covered with Wi-Fi signals.

    Rose has tried many ways to keep away from Wi-Fi signals. In the past six months, she either slept in her car or in tent which she had put up in the woodland and in the fields. She even tried sleeping in a shed(棚子). Being completely tired, Rose had no choice but to quit her job and moved 370 kilometers away from her home to avoid Wi-Fi signals, but failed. Because of the hard life, she got a stomach problem.

    She is now living in a small house in the rural (乡下的) area in England. There is far fewer Wi-Fi signals. However, the house, which belongs to her friend, will be sold to others, so she has to move again soon.

    Rose is planning to move to a more rural area. She is also planning to buy a camper van (野营车) so that she can drive away from Wi-Fi signals whenever she is feeling uncomfortable. As she can not work to make money, she has to raise money online. She is hoping to raise 15, 000 pounds. So far, she has raised over 1, 600 pounds. She still has a long way to go.