四川省历年中考真题分类汇编：完形填空（科普环保类）

When you get into an elevator (电梯), there is a button (按钮) inside. After you press the button, the elevator then takes you to outer space. Does this sound like something from a science fiction film? In fact, it might become 1 in the future.

Scientists hope 2 the space elevator by 2050. The elevator has a strong cable（缆绳）. The cable connects the elevator to the Space Station. The elevator goes up and down along the cable. The elevator might look like an egg. It can take 30 people. The trip is about 36,000 km. It may 3 eight days to get to space.

People can only fly rockets into space right now. But they are expensive. A space elevator would be cheaper. It can do more than just take people into space. The elevator can 4 send heavy things into space. A space elevator could make 5 easier to go into space.

Daisy was in the bathroom. She was brushing herteeth and the tap(水龙头) was on. Water was running.

"Turn that tap off," a voice said loudly. Daisy wasshocked. She 1, but saw no one. "Turn that tap off.You are wasting water!" Someone shouted 2.

This time Daisy turned off the tap and asked, "Who—who are you?"

"I am a drop of water. It's not 3 for me to get here. Do you know where I'mfrom?" "From the tap?" said Daisy.

"No. A few days ago, I was flying comfortably in acloud , enjoying the view from the sky. Then I 4 into a river and that river carried me to alake. Then it was time for me to get cleaned up." "Really?" Daisy doubted."Yes. I was 5 after my journey. So in order to make me safeto drink, people gave me a complete 6.After that, I travelled in the pipes(管道)under the streets. I waitedthere 7 you called me, and here I am."

Daisy said, "So this is the end of your 8?"

"No. When you've finished with me, I will be back inthe sea again. That's where I came from in the first place. Remember not towaste me or pollute me. I'm 9, like gold. See you."

"Wait a minute. What do you mean by gold?" But therewas no 10. The water had gone.

    Now people can pay by scanning (扫描) their faces while shopping. Is it 1 to pay by scanning other parts of our bodies? Amazon has a new technology that scans 2.

    The technology can tell if the person is the right one by scanning his or her hand. The scanner examines things such as finger prints. It then sends a picture to a certain center which can decide who the person is.

    In September 2019, Amazon made a payment system for a US supermarket. People can pay3 by scanning their hands under a machine. Their hand scan is connected to their bank cards, so they can pay successfully. It's quite convenient, especially for 4 people. With this new technology, people 5take their cards with them. They just scan their hands.

    Do you like exercising in the sun? How much sunlight do you get every day? How much time do you spend in the1? As we all know，enough sunlight is good for our health. It gives us strong bones (骨骼) and good eyesight. It makes us happy and sleep better. Now scientists find out that it can even make you2.

    Scientists did tests on mice. They give mice lots of sunlight. After that，the mice3a special thing named glutamic acid (谷氨酸) in their bodies. Glutamic acid does many things for our body. It can improve some of our abilities such as learning and remembering things.

    It is OK to enjoy some sunlight for about an hour every day. But you should be4because it is summer now. The sun is very strong around noon. Keep yourself away from the sun around the noon, or it may5your skin (皮肤). It is best to enjoy sunlight in the morning or before sunset.

    Why not go out and enjoy the6with your family or your best friends? I'm sure you can be smarter soon.

Fifteen wild Asian elephants that left their home in Xishuangbanna last year are continuing to march north, according to China Daily on June 4th, 2021, which attracts much attention 1 the public. The endangered Asian elephant enjoys Class-A 2 in China, the same level as the giant panda does. The number of Asian elephants in China has 3 from 170 in the 1970s to about 300 nowadays. Why are they on the 4 ? Maybe there are two main reasons. First, the growing population of elephants need more space and food to live. Second, some areas where they live often face huge pressure to develop the local economy（经济）, making them move to other areas. 5 the government is taking action to lead them gradually back to their home.

    The traditional Chinese lunar calendar divides a year into 24 solar terms(节气). The Spring Equinox which is called chunfen in Chinese usually falls1March 20 or March 21 every year.

    Standing an egg upright is a2game across the country during the Spring Equinox. People practice this tradition to celebrate the3of spring. It is believed that if someone can make the egg stand, he will have good luck in the future. It's also a good time to fly kites. In ancient times，people did not have good medical resources (资源)，4they wrote their medical problems on a paper kite to ask for good health. When the kite was in the air, people would5the line to let the paper kite fly away, which means the lying away of diseases.

    Can you imagine that we could build a beautiful city with rubbish? Maybe you will think it is1. However, it can be true! Nothing is a waste if we have a creative mind. Let me show you something about2rubbish.

    Sometimes we can see tons of rubbish in the streets, on the roads, near the buildings... here and there. Many large cities became so ugly3it. Nobody likes rubbish, but in fact, some rubbish can be used again. All of us want to solve the problem, we must do something to4rubbish. We should take action from now on.5, some good things will not be wasted.

    Do you often throw away things you don't need any more? Have you ever thought about how these things can actually be put to good use? For Example, when a car gets too old, it may not run any more. But we can use the metal of the car to make something else. When a bottle is empty, it6as waste. You don't know bottle glass can be made into sand and used to build streets. Rubbish7food can be changed into fertilizer to make plants grow better. It is cheap and safe. And other rubbish can also be used to make building blocks. Now,8machines are designed for that.

    9, people will watch films in a beautiful cinema which is built out of rubbish. Besides buildings and roads, cities may be made from rubbish. But so far, building beautiful cities made from rubbish is only10.

    In the new sci-fi film. The Wandering Earth《流浪地球》, humans save the Earth without leaving it. In many-even most-space-themed films, whenever Earth faces a disaster(灾难), the1 is always running away from the planet in spaceships.

    But the latest Chinese sci-fi movie, The Wandering Earth, offers a different and more ambitious idea. In the film, based on a short story by Chinese sci-fi writer Liu Cixin, Earth is in danger of being destroyed by the dying sun. In reply, humans around the world work 2 to build a huge engine system that will push Earth away from the dying sun.3 giving up Earth-again-this time we're taking it with us.

    This "ambition" didn't come from nowhere. For thousands of years," homeland" has had a soft point in 4 of Chinese people. One old idiom is "luoyeguigen", which means returning to one's homeland at the old age, like 5 leaves return to the roots of their trees. Or there is an ancient poem, "The season called the White Dew begins tonight: Nowhere as in our native place is the moon so bright". These6 show the tight link that Chinese people have had with their homeland.

    This special cultural background is probably the key 7separates The Wandering Earth from Hollywood-style space films.

    "What is Chinese sci-fi?"Guo Fan, the film's director, said in an interview. "A movie that can really 8our cultural and spiritual view can be called Chinese sci-fi. Or, we're just copying others and telling the same American stories."

    And the makers of The Wandering Earth may have chosen the best time to tell its Chinese sci-fi story. The film was released on Feb 5^th, the first day of Chinese New Year. It was a time when many people had just made the 9journey back to their hometowns.

    So to them, there is only one possible way to tell the story. Earth10wherever humans go, because it's our home forever.

    On April 23.2019, a series of events to celebrate the 1 anniversary of the Chinese People's Liberation Army(PLA)Nay(中国人民海军)was held in Qingdao.

    Destroyers(驱逐舰) sailed in the sea, submarines(潜艇) slid under the surface and fighter jets flew across the sky. It wasn't a scene from a war movie, indeed, it was a real grand naval parade.

    As a large country 2 more than 18,000 kilometers of coastline, China needs a strong navy. This was a hard lesson3 by history. According to Xinhua, from the 1850s until 1949.foreign forces used the sea to make about 470 invasions of China. Therefore, the PLA Navy has become a key line of the nation's defense.

    As President Xi Jinping said, the oceans are of great significance as they sustain life and connect the world. "The blue planet that humans inhabit is not divided into islands by the oceans.4is connected by the oceans to form a community with a shared future, where people of all countries share weal and woe," said Xi during his 5at the event.