Little Bob was born in a poor family. What's worse is that his father has been ill for a long time and can not do any housework at all. Bob's mother is very busy with the housework besides working in her factory. Bob can understand her mother's hard work and he always does some housework for his mother, though he is only eight years old. Here is what he usually does every day.

    Keep his bedroom clean. Take good care of his things and put them away every day. If he makes them dirty, he will clean them up quickly.

    Ask his mom what he could do. His mother will probably have suggestions for things he could do for her.

    Feed the pets every day. There is a parrot, a cat and a dog in his house. He feeds them and gives them water every day. And after school, he often plays with his dog.

    Wash his own clothes. When his clothes are dirty, he will wash them by himself, he says it's a good thing to make his mother happy.

    My name is Bill. I'm from England. I am a worker. I work in a clothes shop. My wife , Ann, is a teacher. She teaches English in a junior high school. We have two kids: a son and a daughter. They are students. Jim is our son. Now he is in his favorite T-shirt and blue pants. Sally is our daughter. She likes blue very much. Now she is in her blue dress. My father's name is Robby. My mother's name is Diana. They are old and they don't work now. I have a brother. His name is Robert. He is a worker, too. My wife's father is Sam. Her mother's name is Rose. Her sister is Lily. She is a teacher, too.

    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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Hello, I'm Susan. This is my schoolbag. {#blank#}1{#/blank#}. They're my favorite colors. There are many things in it. Look! {#blank#}2{#/blank#}. What color is the pencil box? It's yellow. {#blank#}3{#/blank#}. The pen and the ruler are blue. {#blank#}4{#/blank#}. The CD is white. It's David's CD. The jacket is black. It's my jacket. {#blank#}5{#/blank#}. What color is it? It's blue and red.