At night, I lay in bed and fell asleep soon. Gradually, I felt someone pushing me, and when I looked intently, it turned out to be several good partners in my class. They said to me, "Today, the school organized an expedition to the Amazon River. Let's go together! " "Great!" I jumped three feet for joy. In geography class, we have learned that the Amazon River is the largest river with the largest water volume and the widest drainage area in the world, and it is surrounded by the largest tropical rain forest on earth. This primitive tropical rain forest has existed for at least 100 million years. This school has really created a good opportunity for us to uncover the mystery of the virgin forest. We came to the edge of this forest by magic carpet. The flight all the way exhausted everyone, but no one took a break and walked into this mysterious forest with a whole backpack on his back. This forest covers the sky and is very quiet, but sometimes I can hear some unknown animals barking, which sounds sad and scary to me, just like crying. There is a thick layer of fallen leaves under your feet, like a soft carpet, but the leaves have lost their usual green color and become dark blue, crimson, deep purple, or simply black. From a distance, it looks like a whole dark cloud falling to the ground. Sometimes the forest is dense, but sometimes it is relatively sparse. In sparsely populated places, it is lucky to see the palm-sized blue sky and a circle of sunshine like a flashlight during the day. Thousands of years old trees can be seen everywhere here, and the trunk is covered with thick vines. They crowded together regardless of you and me, as if they were fighting for something. The road has gone a long way, and I don't know who shouted like discovering the new world: "Look, the waterfall!" " "We all ran over and saw the water curtain hanging high. Although it was only so narrow, it felt like a fairy's silk, which kept pulling and rolling, and kept touching stones covered with green velvet plants, and then merged into a trickle and injected into the pool. In a blink of an eye, it is near dusk, and we are eager to find a place to live. We walked for several miles and finally found a pond. On the pond, there are several cabins built by local people. We went in, and the objects inside were mostly made of wood and bark, which was very unique. This seems to be a small tribe, where people are surprised to see us. One of the middle-aged men, like a leader, said something to others and went their separate ways. The middle-aged man came over with a smile and chatted for a while. Although we don't understand them, we know they are friendly. Then he showed us around other wooden houses, and we learned some gesture manners from him. We lived there that night. Some students recorded the events of the day with notebooks and flashlights, and some students were sorting out the plant specimens collected during the day. After returning to the city, we reported the geological environment and customs there to the relevant departments, which greatly helped them to study the virgin forest. " Tick tock ... "When I opened my eyes, I was still lying in bed, and the alarm clock had woken me up. It was a dream. I really hope this dream can come true. I also want to be an explorer in the future, and make contributions to the study of human primeval forests.