题目内容

 It 's our duty to_________people_________too many trees.

A. stop; cutting down          B. prevent,  to cut down

C. keep; cutting down         D. make; cut down

 

【答案】

A

【解析】略

 

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 — Our classroom____________every day.

— So it is. It's our duty to keep it clean and tidy.

A. cleans        B. is cleaning        C. is cleaned

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 BoyleD．Thomas Edison
【小题2】 From the text, a red cabbage is a kind of ____.
A．plantB．animalC．paperD．liquid
【小题3】What is widely used as the acid-base indicator now?
A．red cabbageB．litmus paper
C．any plantD．any flower
【小题4】The story mainly tells us ____.
A．how to make litmus paperB．about the three kids’ spirit
C．scientists were wrongD．the kids are heroes

补全对话

A: Are you going to have ___1______ classes next week?

B: No, we ____2____.

A: What are you going to do __3_____?

B: We’re going ___4____ holiday to Beach Park School in New York. It’s our sister school.

A: Oh! That’s great. How __5____ students are going there?

B: Forty.

A: Who is going to ____6____ you there?

B: Our teacher, Miss Wang.

A: ___7____ are you going there?

B: We are going there ____8___ plane.

A: How many days are you going to ____9____ there?

B: Ten days.

A: I’m sure you’re going to have a ___10_____ time.

 

阅读短文，判断下列句子是否符合短文内容。符合的写“A”，不符合的写“B”。（共5小题，每小题2分）

Water is the most important in our lives. Not Many people understand this but it’s quite true. The human body can go without food for a long time. We’ve got many examples for this. Yet two or three days without water can usually make people die. Man can’t live without water.

  Many people don’t understand how much water the human body needs to work well, and many people, especially young people, do not drink enough water, even in very hot weather. About two thirds of our body is water. When we do sports, some of the water will get away from our body. If we don’t drink some water, our body won’t have enough water. And if we don’t have enough water, we’ll feel tired and many of us will get ill. So you know how important water is to us.

 But at present we face water crisis(危机). Water is becoming less and less. So， we should protect water resources(资源) and try our best to save water in our daily life. Here are some tips for saving water:

1. Turn off the tap(水龙头) in lime.

2. Take shorter showers.

3. Don’t let water run while washing your face and reuse the water after we finish washing.

4. Encourage your friends and neighbors to join in the action of saving water.

1.Nobody can live without water.

2.About one third of our body is water

3.If one doesn't have enough water, he’ll feel tired and may get ill.

4.We’d better take longer showers and let water run while washing.

5.It’s our duty to protect water resources and save water.

 

 —It’s our duty to           homeless people in earthquake areas           food and clothes.

—I agree with you. We should do something for them.

A. provide, of               B. provide , with             C. provide , for

 

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