Liangzhu Museum displays various burial objects found in the Archaeological Ruins of Liangzhu City, a UNESCO World Heritage Site. The ruins have gained worldwide recognition     1     evidence for the existence of at least 5,000 years of Chinese civilization.

When Zhang Han set foot inside Liangzhu Museum, the 10-year-old embarked on a tour that took him back more than 5,000 years. Wearing the smart glasses, Zhang     2     (present) with virtual images of relics. Augmented reality glasses feature among a string of measures taken by the museum to give visitors a more vivid experience of Liangzhu civilization, while     3     (help) them gain a better appreciation of Chinese culture.

Tourists can also visit the official website of Liangzhu Museum to enjoy a virtual tour. With     4     click of the mouse, they can gain access to exhibition halls that they may never be able to visit     5     (physical).

    6     (advance) technologies are increasingly playing a major role in Chinese museums. In the northwestern Chinese city of Dunhuang,     7     is known for the UNESCO World Heritage Site Mogao Grottoes, the “digital Dunhuang project” has made extensive use of digitalization. By the end of 2021, it     8     (complete) the digital collection of 268 grottoes, the image processing of 164 grottoes, and so on.

The     9     (protect) and revival of Dunhuang’s ancient culture is not an isolated case in China. The Yungang Grottoes in Shanxi province also have 3D “digital archives”, which allow precious cultural relics and historical archives     10     (preserve) permanently.

Earth Day is a yearly event celebrated on April 22. Various activities    1    ( hold ) worldwide to show support for environmental protection. Here is a brief history of    2    event.

In the 1960s, Americans were becoming aware of the effects of pollution    3    the environment. In 1969, Senator (参议员) Gaylord Nelson,    4    ( consider )one of the leaders of the modern environmental movement, developed the idea of Earth Day. His idea really raised    5    (aware )about the environment. On April 22, 1970, over 20 million people turned up for the first Earth Day. They believed it was important    6    ( keep ) the planet safe.

In 1990, Earth Day went global, with 200 million people in over 140 nations     7    ( participate ). In 2000, Earth Day focused on clean energy and involved hundreds of millions of people in 184 countries and 5000 environmental    8    ( group ). Activities ranged from a traveling to a gathering of hundreds of thousands of people at the National Mall in Washington, D. C. Today, the holiday is a global celebration    9    is sometimes extended (延长) into Earth Week, a full seven days of events focusing on green living. In 2018, more than 1 billion people were involved in Earth Day activities, making it one of the    10    (large)events in the world.

The Great Wall was listed as a World Heritage by UNESCO in 1987. Just like a dragon, it winds up and down across deserts, grasslands and mountains,    1    ( run) approximately 21,196 kilometers from east to west.

The    2    ( construct) of the Great Wall was not that easy,    3    drew heavily on the local resources for building materials. The walls were    4    ( origin) built in the Spring & Autumn Period and the Warring States Period. Emperor Qin Shi Huang succeeded in his effort to have them joined together. Since then, the Great Wall    5    ( serve) as a monument of the Chinese nation throughout history.

With    6    history of about 2,700 years, some parts of the Great Wall are now       7    ruins or have disappeared. However, the Great Wall of China is still one of the most appealing    8    (attraction) all around the world owing to its historical significance. The best-known part of the Great Wall of China, Badaling ,    9    (locate) 43 miles northwest of Beijing, attracts thousands of national and foreign tourists every day.

Today, the Great Wall    10    (recognize) as one of the most important impressive architectural achievements in history.