Dear Mr. Wang,
       Someone comes to the office to see you in the morning, but you and your wife are out. He comes here at 10 a.m. Because he is very busy, he goes away half an hour later. He tells me that he is your classmate at college(大学). Now he teaches Chinese in a high school(高中) in this city and he lives near the No. 6 Middle School. He is a very tall man with short hair. He wears a pair of glasses. He tells me his telephone number is  33426685. He is often at home at 7:00 p.m. So you can call him in the evening.

We have heard about people who have special memories. Recently there has been a report about a woman from Australia who can remember almost every detail (细节) of all the events in her daily life.

    Rebecca Sharrock, 25, is one of just 80 people worldwide who have been identified(确定) as having Highly Superior Autobiographical Memory ( HSAM,超级自传体记忆症). It means she can remember every small event—which most people would forget with in (在......以内) days—as if it had happened just minutes ago.

    "I remember my mum putting me in the driver's seat of a car and taking a picture of me when I was 12 days old,” she said. " That's my earliest memory. I remember every day since then. I can't tell all the dates exactly because I was too young to understand calendars, but I remember what I did that every day, what the weather was like and so on.”

    Rebecca can also re—experience taste. If she's eating something that she doesn't like, she thinks about Black Forest cake, her favorite food, and the memory will be so strong that she can nearly "taste” it.

    However,  sometimes her memories prove (证明) to be painful. Because they're not just events that she remembers. "When I relive （再体验) memories, the feelings return, too,” Rebecca said. "For example, I remember falling over when I was three at my grandparents' house and hurting my left knee. Talking about it now, I feel painful in my left knee. "

    "At night, I have to sleep with the radio/recorder and a soft light on, she added. "1f it's too dark or quiet, my mind would be filled with all these memories and I can't sleep. "

The famous scientist and thinker, Charles Darwin, was born on February 12, 1809 in England. 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: birds，eggs，stones and leaves.

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

Then he was sent to study in Cambridge University. 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.

In 1871 Darwin wrote ano ther important book The Theory of Evolution.

Darwin continued his studies in science until he died in 1882.

    Mary is a housewife with two 1. She is not good at 2 and it has always been the target (目标) of family jokes.

    One evening, Mary got ready for dinner a bit too 3. The kitchen started to fill with smoke and the smoke detector (烟雾报警器) went 4. 5 both of Mary's children had fire-safety 6 at school, they did not react (反应) to the alarm. Mary 7 annoyed (恼怒的). She stormed through the house in search of the two kids.

    She found 8 in the bathroom, washing their hands. Over the loud noise of the smoke alarm, she asked them 9 the sound was.

    "It's the smoke detector," they replied.

    "Do you know what that 10 means?" she asked.

    "Sure," the oldest replied. "Dinner's ready."

    The class was coming to an end. The teacher told the pupils not to draw anything on the wall in order to keep it clean.

    After class, David forgot the teacher's words. He took a piece of chalk and drew a sun on the wall. Just then, he noticed that the teacher was coming back again. So he quickly covered his drawing with his back. The teacher didn't find out what he was doing. When she passed, she smiled at David. David was very happy. But when he turned around to see his drawing, he found nothing on the wall.

    Where was David's drawing?