题目内容

A good book on your bookshelf is like a friend. I like reading books. My name is Mary. I'm a _______ of a middle school. I'm 11 years old. I want to tell you _________ I like reading books.

I think we can find _________ to all questions from the books. I know a book. Its _________ is The stories for the kids . The book has many ___________ for kids. They are ___________ and they can tell you many things. It's very good and I _______ it so much. I like science books, too. They are my science _________ . I learn a lot from the book Whys for Kids — Why the Cat Eats Fish.

When you go to another city by bus, maybe your field trip is _________. It doesn't matter. You can read storybooks. There is lots of fun in the __________. It can make your trip more meaningful.

By reading, I enrich(丰富) the mind. So I like reading books.

1.A.teacher B.doctor C.worker D.student

2.A.how B.what C.why D.which

3.A.answers B.keys C.inventor D.value

4.A.aim B.name C.picture D.date

5.A.animals B.words C.gifts D.stories

6.A.boring B.interesting C.difficult D.scary

7.A.mind B.stand C.enjoy D.watch

8.A.subjects B.inventions C.computers D.teachers

9.A.exciting B.relaxing C.boring D.tiring

10.A.trip B.buses C.books D.school

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(2018·山东临沂)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!

根据短文内容,选择最佳答案

1.During the experiments to find a medicine for staph infections, ________.

A. the dishes were not covered

B. staph and mold were put together

C. mold was kept in small dishes

D. staph was grown in small dishes

2.The word “ dreaded” means “_______”.

A. famous B. scary

C. health D. endangered

3.The last paragraph suggests that _______.

A. accidents happen to everyone

B. the careful person does not have accidents

C. the careless person will miss valuable chances

D. luck is enough when doing scientific experiments

4.Most of this passage is written by ______.

A. telling an unusual story B. showing the results of experiments

C. offering some reasons D. giving some advice

5.This passage is mainly about ______.

A. medicine for a staph infection B. useful accidents

C. Dr. Fleming’s research D. discovering penicillin

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