Three kids have been learning chemistry for only a few months. But they have already begun to challenge (挑战) a world famous scientist!
Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.
"We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."
British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.
But when the kids did some experiments in class last winter, they saw that the litmus paper didn’t turn very blue with base matter. It's hard to get a clear result.
Will there be a better indicator than litmus paper? The three kids decided to try and find out!
How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨) leaves, flowers and stems (茎) to get the pigments (色素) from them.
The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper!
"It's our first scientific journey, Huang said, "But it makes me want to try harder."
【小题1】 Whom did the three kids want to challenge?

A．Their chemistry teacher.	B．Their headmaster.
C．Robert Boyle	D．Thomas Edison

【小题2】 From the text, a red cabbage is a kind of ____.

A．plant

B．animal

C．paper

D．liquid

【小题3】What is widely used as the acid-base indicator now?

A．red cabbage	B．litmus paper
C．any plant	D．any flower

【小题4】The story mainly tells us ____.

A．how to make litmus paper	B．about the three kids' spirit
C．scientists were wrong	D．the kids are heroes

An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they had no money. Only a very expensive operation could save him now and there was no one to lend them the money.

When she heard her daddy say to her tearful mother，“Only a miracle （奇迹）can save him now，”the little girl went to her bedroom and pulled her money from its hiding place and counted it carefully.

She hurried to a drugstore（药店）with the money in her hand. “And what do you want？” asked the salesman. “It’s for my little brother，” the girl answered. “He’s really，really sick and I want to buy a miracle.” “Pardon？” said the salesman. “My brother Andrew has something bad growing in-side his head and my daddy says only a miracle can save him. So how much does a miracle cost？” “We don’t sell a miracle here，child. I’m sorry，”the salesman said with a smile.

“Listen，if it isn’t enough，I can try and get some more. Just tell me how much it costs.”

A well-dressed man heard it and asked，“What kind of a miracle does your brother need？”

“I don’t know，”she answered with her eyes full of tears(眼泪). “He’s really sick and mum says he needs an operation. But my daddy can’t pay for it，so I have brought all my money.” “How much do you have？” asked the man. “$ 1.11，but I can try and get some more，” she answered.

“Well，what luck，”smiled the man. “$ 1.11，the price of a miracle for little brothers.”

He took up the girl’s hand and said， “Take me to where you live. I want to see your brother and meet your parents. Let’s see if I have the kind of miracle you need.”

That well-dressed man was Dr Carlton Armstrong，a famous doctor. The operation was successful and it wasn’t long before Andrew was home again.

How much did the miracle cost？

1.In the eye of the little girl，a miracle might be ______________.

A．something interesting                    B．something beautiful

C．some wonderful medicine                 D．some good food

2.What made the miracle happen？

A．The girl’s love for her brother.            B．The girl’s money.

C．The medicine from the drugstore.           D．Nobody can tell.

3.From the passage we can infer （推断）that _______________.

A．the doctor didn’t ask for any pay

B．a miracle is sure to happen if you keep on

C．the little girl is lovely but not so generous

D．Andrew was in fact not so sick as they had thought

 

An 8-year-old child heard her parents talking about her little brother Andrew. All she knew was that he was very sick and they had no money. Only a very expensive operation could save him.
One morning, the girl heard her father say to her mother: “Only a miracle can save Andrew now.” The girl went to her bedroom, collected all of her money and counted it carefully. She hurried to a drugstore.
“How can I help you?” asked the salesman.
“I want to buy a miracle,” the girl answered. “My brother has something bad growing inside his head. My daddy says only a miracle can save him. So how much does a miracle cost?”
“We don’t sell miracles here, my dear. I’m so sorry,” the salesman said, sadly.
“What kind of a miracle does your brother need?” asked a well-dressed man standing nearby.
“I don’t know,” she answered. “He’s really sick and needs an operation in his head. So I brought all my money.”
“How much do you have?” asked the man.
“$1.11,” she answered, “ but I can try and get some more.” She said again and again.
“Well, what luck,” said the man. “$1.11 is the price of a miracle. Let’s go to see your brother.”
That man was Dr Carlton Armstrong, a famous brain doctor. The operation was successful and it wasn’t long before Andrew was well again. Sometimes miracles do happen.
【小题1】What was the trouble in the little girl’s family?
A. Her brother was seriously ill.
B. They had no money.
C. Nothing could save her brother.
D. Both A and B.
【小题2】In the eye of the little girl, a miracle might be _______.

A．something interesting

B．something beautiful

C．some wonderful medicine

D．some good food

【小题3】The little girl said again and again “...I can try and get some more.” That shows _______.

A．she had still kept some money

B．she hoped not to be refused

C．There was no need to worry about money

D．she thought money was easy to get

【小题4】What made the miracle happen?

A．The girl’s love for her brother.

B．The girl’s money.

C．The medicine from the drugstore.

D．Nobody can tell.

【小题5】From the passage we can infer (推断) that _______.

A．The doctor didn’t ask for any pay

B．A miracle is sure to happen if you keep on

C．The little girl is lovely but not so clever

D．Andrew was in fact not so sick as they had thought

Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And they can eat small animals. One famous meat-eating plant is the Venus flytrap.

The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs.  If a fly touches one of the hair, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.

Why do plants do such things? As we know, most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It does not have all these important things, especially nitrogen( 氮 ). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need.  Let’s hope that some of the bigger plants don’t get the same idea!

1.The Venus flytrap is a kind of _______.

A. food    B. animal    C. plant   D. meat

2.Why do some plants eat animal meat? Because _______.

A. plants are dangerous to animals

B. animals are dangerous to plants

C. plants want to get what they need from animal meat

D. plants want to protect themselves against animals

3.Where can most plants get what they need?

A. From the people   B. From the animals

C. From the soil      D. From the sun, the air, and the ground           

 

An eight-year-old child heard her parents talking about her little brother. All she knew was that he was very sick and they had no money. Only a very expensive operation(手术) could save him now and there was no one to lend them the money.
　　When she heard her daddy say to her tearful mother， “Only a miracle(something couldn’t happen) can save him now，” the little girl went to her bedroom and pulled her money from its hiding place and counted it carefully.
　　She hurried to a drugstore(药店)with the money in her hand.
　　“And what do you want？” asked the salesman. “ It's for my little brother，” the girl answered. “He's really，really sick and I want to buy a miracle. ”
　　"Pardon？”said the salesman.
　　“My brother Andrew has something bad growing in-side his head and my daddy says only a miracle can save him. So how much does a miracle cost？”“We don't sell a miracle here，child. I'm sorry，”the salesman said with a smile.
　　“Listen，if it isn't enough，I can try and get some more. Just tell me how much it costs. ”
　　A well-dressed man heard it and asked， “What kind of a miracle does your brother need？”　　“I don't know，” she answered with her eyes full of tears. “He's really sick and mum says he needs an operation. But my daddy can't pay for it， so I have brought all my money. ”
　　“How much do you have？” asked the man. “$ 1.11， but I can try and get some more，” she answered.
　　“Well, what luck，”smiled the man. “$ 1.11， the price of a miracle for little brothers. ”
　　He took up the girl's hand and said， “Take me to where you live. I want to see your brother and meet your parents. Let's see if I have the kind of miracle you need. ”
That well-dressed man was Dr. Carlton Armstrong, a famous doctor. The operation was successful and it wasn't long before Andrew was home again.
　　How much did the miracle cost？
【小题1】What was the trouble in the little girl's family？
A. Her brother was seriously ill.
B. They had no money.
C. Nothing could save her brother.
D. Both A and B.
【小题2】In the eye of the little girl,a miracle might be _______.

A．something interesting

B．something beautiful

C．some wonderful medicine

D．some good food

【小题3】What made the miracle happen？

A．The girl's love for her brother.

B．The girl's money.

C．The medicine from the drugstore.

D．Nobody can tell.

【小题4】From the passage we can infer(推断) that _______.

A．The doctor didn't ask for any pay

B．A miracle is sure to happen if you keep on

C．The little girl is lovely but not so clever

D．Andrew was in fact not so sick as they had thought