Unit 3, Book 2, Grade 4 Composition

In the usual study, work and life, everyone has the experience of writing a composition, so you are familiar with it. Writing is a verbal activity in which people express their feelings in written form. So have you ever studied composition? The following is my carefully arranged composition in Unit 3, Volume 2, Grade Four. Welcome to share.

In the morning, I found a spider web in the corner of my house. My strong curiosity drove me to catch a small grasshopper and put it on a spider web.

At this moment, a spider crawled out from the crack in the wall. It vomited a mouthful of white silk next to the grasshopper, wrapped it up and returned to the hole. I am puzzled: why do spiders go back to their holes and why don't they eat grasshoppers? I continued to observe. But after waiting for a long time, the spider just won't come out.

The next day, I was surprised to find that the spider had eaten the grasshopper, leaving only an empty shell on the Internet. I wonder why spiders don't eat shells. In order to find the answer, I read a lot of information and finally found the answer in "100,000 Why". It turns out that after a spider catches its prey, it first wraps it with silk, and then spits out a digestive juice and injects it into its prey. This digestive juice can dissolve the internal tissues of insects composed of protein, and it will become juice after the insects die. Spiders can suck big mouthfuls. Because the shells of insects are not made of protein, the shells of grasshoppers remain intact on the net.

Through this unexpected discovery, I know the mystery of spiders eating. Although this is only a small discovery, it makes me understand a truth: pay attention to learning everywhere. It seems that the essence of Pingla Fanfan actually has endless mysteries waiting for us to explore and discover.

I am proud of my little discovery.

There is a cartoon in Unit 3, Book 2, Grade 4: It shows a man chopping down big trees with an axe in his hand, and the trees turn into bare stumps one by one. Seeing this cartoon with my own eyes, I was lost in thought.

Everyone says that we should protect the environment and care for trees. How much can we do? Trees are indispensable to human life. They absorb carbon dioxide harmful to human body first, and then release fresh air, and do their duty without complaint. It has also contributed to beautifying the environment and making great contributions to mankind.

But humans don't know how to repay the greenguard tree. For their own benefit, they waved sharp axes and hacked wildly on the green trees. Lush trees have turned into stumps, and birds have lost their homes for survival, and they are helpless about human behavior. The "trees that have not yet died" are heartbroken and sad to see their brothers and sisters "needlessly" sacrificed. Due to human ignorance, the desert constantly devours oases. Those felled trees are used by human beings to build houses and factories, which are only beneficial to human beings, but pose a great threat to the environment and have serious consequences.

Here, I sincerely appeal to the world: Please save trees. If green trees disappear from the earth, then human beings can't survive. Let's mobilize to save trees!

Today, I am very happy, because I caught a lovely big frog.

I went home happily, put the frog in a glass container, put water on it, and carefully observed the big frog. It is dressed in green and black camouflage clothes, with a bulging belly and four beautiful legs. The hind legs are longer than the front legs. I tease it with branches from time to time, and its hind legs kick and jump, very scared and worried. It croakes at me from time to time, as if to say "let me go".

At this moment, the radio broadcast the contents of protecting beneficial insects and frogs. After I heard it, I quickly checked "100,000 Why", only to know that frogs are good friends of human beings and we should protect them. I knew I had made a mistake, so I said to the frog, "I'm sorry, I made a mistake." The frog croaked at it again, as if to say, "You are a good boy." I quickly took the glass container and ran to the river with the frog to set it free.

I was very happy when I got home.

Unit 3, Book 2, Grade 4 Composition 4 Night arrival, the exciting moment has arrived. Because we can watch the fireworks at the watermelon Lantern Festival again!

We went to the East Lake first, where there was already a sea of people, full of people, all holding their heads high and sticking their heads out. Around seven o'clock, near the South Island, sparks were everywhere and the crowd was boiling again.

The spark gradually turned into three fire dragons and went straight into the night sky. They danced and gave off bursts of red light. Gradually, the red light disappeared and the fire dragon disappeared. Suddenly, with a bang, three beautiful flowers and colorful clouds made by Weaver Girl burst out. There is also a firework like the Olympic rings in 2008.

Suddenly, a large number of meteor showers suddenly fell, as if the earth was covered with a golden coat. Hatefully, when the meteor shower came down, it stopped in front of me, as if to say, if the meteor shower comes, make a wish quickly, or there will be no chance; I was so scared that I quickly blocked my face for fear of disturbing me.

At that time, the sky above Pinghu became a city that never sleeps, reflecting the happy life of Pinghu people.

Wang Qiang and Wang Cheng both like to play with small animals and dissect animals. Once, an old farmer smashed several mussels with bricks and ate them. I saw a light blue liquid flowing out of the broken mussel, so I asked him, "What is this?" Uncle said, "It's the blood of mussels." When I heard this, I felt and thought, blood is red. How can the blood of mussels be light blue? "

This afternoon, we went to the river to touch mussels. After a while, we touched a lot. We chose one.

Most importantly, I decided to do an experiment. We put the mussels in the washbasin. When it opens its shell, we insert a wooden stick and leave a gap between the two mussels. Then I saw a light blue heart beating gently. We carefully cut it with a sharp knife and saw a light blue liquid flowing out of it.

At this time, we believed the farmer's uncle's words, and the blood of mussels was indeed light blue, indicating that the blood of animals was not all red.

Zhong Bing, Liu Cheng and I all like playing with small animals and dissecting animals. Once, an old farmer smashed several mussels with bricks and ate them. I saw a light blue liquid flowing out of the broken mussel, so I asked him, "What is this?" Uncle said, "It's the blood of mussels." When I heard this, I felt and thought, blood is red. How can the blood of mussels be light blue? "

This afternoon, we went to the river to touch mussels. After a while, we touched a lot. We chose the biggest one and decided to do an experiment. We put the mussels in the washbasin. When it opens its shell, we insert a wooden stick and leave a gap between the two mussels. Then I saw a light blue heart beating gently. We carefully cut it with a sharp knife and saw a light blue liquid flowing out of it.

At this time, we believed the farmer's uncle's words, and the blood of mussels was indeed light blue, indicating that the blood of animals was not all red.

In our daily life, we often hear the phrase "a drop of water wears away a stone". Today, I have a better understanding of these words.

We know that the power of a drop of water can be ignored, but if a stone is placed under a drop of water and the drop of water keeps hitting somewhere on the stone, the stone can be worn out! A person, no matter what he does, must drop water first. In that case, he can succeed. As the saying goes: "Where there is a will, there is a way!" Zhang Haidi is a man of great knowledge. Although she has insomnia in her lower body and can't even control her urine and stool, she didn't give up her study and pursuit of life because she is disabled! On the contrary, although she didn't go to school for a day, she finished all the courses in primary and secondary schools and taught herself English, German, Esperanto and other languages. In order to reduce the frequency of going to the toilet, she drinks less water, eats less, and sometimes doesn't even go into the water. For a long time, her body endured great pain and insisted on studying even in a wheelchair. She also made unremitting efforts to study and finally became a knowledgeable and well-informed person. In addition, she also learned to repair electrical appliances and some medical knowledge!

Yes, even a disabled person can become a knowledgeable and well-informed person; Even a drop of water can penetrate a hard stone. Can we back down? Not only can't back down, but also study hard, persevere like Zhang Haidi, and study wholeheartedly and persistently like a drop of water.

This week, my brother who went to college in Chengdu will come back. My family and I are very happy and look forward to his early return.

That morning, my uncle and I went to pick them up by bus. The bus gradually drove into the busy area, and more and more people got on the bus. From time to time, some elderly people come over. The passengers sitting in the front saw the old man coming and hurriedly let the old man sit in his seat. Seeing such a scene, I thought: I am a young pioneer, and I should do more good deeds. Besides, I have to type the words "respect the old and love the young" from time to time in the car.

Be sure to give your seat to those old people. Do it. My eyes were fixed on the car door, hoping that an old man would come up and give him his seat, but God seemed to have done the right thing for me. I haven't seen the old man get on the bus for several consecutive stops. Just as I was about to give up, suddenly an old man in his sixties came along with his little granddaughter. He came back to see if there were any seats left. Alas, there is no seat, I think: now I can show my talent! Just as I was about to give up my seat, I saw a place not far from the railway station, and I thought: I'll be there soon, and it's okay to stand for a while, but I thought: I'm a young pioneer, and I should give up my seat to the old man. Just when my heart was full of contradictions, I suddenly heard: Baotou Station, the terminal station, has arrived. I got off the bus slowly and regretted not giving up my seat.

I'm ashamed of it!

Unit 3, Book 1, Grade 4 Composition 9 My birthday is coming. Dad gave me a lovely little turtle, and I was very happy. The tortoise has a hard shell on its back. It walks slowly and is very cute.

I take good care of her every day. I feed her every time I go home, and sometimes I take her to bask in the sun ... I like her very much. Every time I go to school, I will reluctantly say goodbye to her. Even when I sleep, I will hold her and her nest and watch her fall asleep. The little turtle also thrives under my care.

Once, my parents were not at home, and I was bored, so I took the little turtle out of the basin and played with her. However, I found that the little turtle has been kept for a year. I take care of her so well, feeding and changing water on time every day, but why is she still so young? I was very anxious, thinking that I increased the food from one bag to two bags every day, and the food increased. Will she get bigger? As I said, I increase food every day. The little turtle really grew up, and I was very happy, so I increased the food from two bags to four bags, hoping that she could grow into a turtle quickly from the little turtle. However, I fed too much, and the little turtle was suffocated.

I was sad and cried for a long time. From this incident, we know that the growth of any living thing has its own laws. If you are eager for success, it will backfire and do bad things with good intentions. Instructor: Teacher Yang.

Unit 3, Volume 2, Grade 4 Composition 10 These days, I am particularly interested in observing grass. She emerged from the ground as if to tell people that spring was coming.

I encountered some problems in the process of observation: why did the grass stick its head out so early? Does she grow by herself or need someone to sow ... I checked the information on the internet, and it turns out that the weather starts to go underground when it gets warmer, so the grass is not afraid of cold. She still doesn't need sowing. In autumn, hay becomes grass seeds, which are blown away by the wind, spread into the soil and grow new grass. This is how she grew up from generation to generation.

Grass can be seen everywhere, under the wall, on the ground, in cracks ... how tenacious she is, no matter how much pressure she has to bear, she tries to drill upward and add a touch of green to spring. In learning, why not? As the "Code of Daily Conduct for Pupils" says: When encountering setbacks and failures, don't lose heart, don't be discouraged, and try to overcome difficulties. When we fail, don't treat ourselves as dwarfs, but believe that we are the best and make our own contribution to the motherland.

Unit 3, Book 2, Grade 4 Composition 1 1 This afternoon, we will hold a tug-of-war competition. Everyone is very happy.

I finally made it to the afternoon. On the playground, a thick rope is pressed against two white lines in the middle of the playground, and a red cloth strip is tied between the ropes. Whoever can pull the red stripe in the middle of the rope over the white line at his end will win. The teacher divided the class into two teams, and the students all tried their best. Surrounded by students watching the scene of bustle, even the young trees shook their arms as if to say, "Come on! Come on! "

"get ready!" Cried the referee. Both players grabbed the rope.

"Du-"whistle sounded and the game officially started. We didn't give in to each other, so we backed off as much as possible. Let's take a look at Tintin in the last film. He grabbed the rope with both hands, gritted his teeth and pulled back. He is like a wooden head. No matter how the other person pulls, his feet hardly move. Look at the Hercules who joined our team. His face was flushed and his right foot pressed on the heel of the classmate in front.

Unit 3, Book 2, Grade 4 Composition 12 We live in harmony with nature every day, and her magic and beauty leave us with infinite reverie. Many scientists got inspiration from it and made inventions, which greatly improved our lives.

Frogs have very special eyes. They are very keen on watching moving things, but they are very slow on still things. People invented the "electronic frog eye" by using the characteristics of frog eye, so that people in the airport can accurately command the plane to land.

Banana leaves are arranged in a spiral shape, which can get enough sunshine. Therefore, the house built by architects according to this shape can also make every room enjoy warm sunshine.

People still get a lot of inspiration from nature. For example, the "law of gravity" was discovered in "Falling from the Apple"; Invented "anti-load flight suit" from "giraffe's body structure"; Inventing "Modern Night Vision Device" from "Rattlesnake" ...

This shows that the world is full of miracles. As long as we observe carefully and dare to explore, even a grass will have its wonders and bring us thousands of inspirations. Therefore, while enjoying nature, we should also discover and observe many mysteries, make rational use of them, provide more convenience and make people's lives better.

The composition 13 in Unit 3, Book 2, Grade Four Bionics is not only interesting, but also endless! Let me spread the wings of imagination and see how bright the prospect of preventive medicine is! For example, it has a temperature change of one thousandth degree. If you use this skill to predict the eruption of a volcano, what a disaster it will save mankind! For another example, if we can find out what substances wasps use to make the insects they prey fall asleep for dozens of days, then we can create an anesthetic that can play a long-term anesthetic role, not only alleviating the pain of patients, but also providing greater convenience for the study of anatomy and physiology. If the reproductive function of mice can be transferred to silver carp, musk, an extremely expensive miracle drug, and its related spices and foods can be popularized.

Writing here, I want to talk about the secret hidden in my heart for a long time. Now I want to learn biology well, and then I want to learn zoology and lay a good foundation. I want to make a difference in the field of bionics in the future!

Unit 3 Composition 14 Ding, Ding, Ding, start the class. This is physical education class. I ran to the playground happily.

I saw the teacher coming slowly and whistling a few times. When we heard the whistle, we immediately lined up. The teacher said, "Today we practice long jump". As soon as the teacher finished speaking, some students shouted happily, some jumped up happily, some shouted happily, some applauded happily, not to mention being excited.

The teacher took us to the bunker and divided the students into two teams, boys and girls. First, the boys began to jump. They lined up neatly and walked with vigorous steps, as if to beat us girls. We girls are also full of strength and courage. . . .

The "DuDu" competition began, and the boys jumped out of the bunker with a strong jump. Ah, it's so far, just like the Monkey King's somersault. Then Zhao Kangqi jumped. He jumped up and his legs seemed to be flying. Suddenly, just as he was about to fly to the sky, a bang fell, which made us burst into laughter. He made so much effort, but the result was that he didn't jump far. We laughed at him for jumping not far but high.

It's finally our turn as girls. We tried our best to jump, but it was not far. Instead, let boys see jokes. Girls can always jump to one place after another. It's my turn I tried my best to jump, and finally I jumped farther than others. . . . . . In the end, we girls lost to boys.

Although we lost, we still laughed, because we had a happy physical education class.

Why cicadas make sounds has always been a mystery to me. In order to uncover this secret, I often hide under a tree and observe quietly. I found that cicadas always "hold out their chests" and "raise their tails" when they sing.

Why is this? One day, I caught a cicada and made an observation. I took off the wings of the cicada and put it on the ground. It slapped little wings and cried on the ground. I broke its needle-like mouth again, and it still barked. What is the pronunciation of cicada? After repeated observation, I found that the sound seemed to come from my chest. So I grabbed it and looked at it. On both sides of its concave part, there is a scaly hard shell, like a pair of pliers, with a pair of transparent films inside. Cicada chirps, and the piece moves back. When I gently defended this place with my hand, the cicada called. I keep squeezing it, and it keeps barking. I thought: this pair of pamphlets is its sound generator! I punctured the membrane, and no matter how I pinched it, it stopped barking. Later, my mother told me that this is the "castanet" of cicadas, which is a special pronunciation device for male cicadas. When the muscles of the vocal membrane contract and vibrate, cicadas make sounds. The female cicada has no castanets, so she is mute.

At this time, I realized why cicadas always like to "hold out their chests" and "raise their tails" when they sing. Uncovering the secret of cicada pronunciation, I once again tasted the sweetness of thinking and learning science.