The opening ceremony of the 2022 Winter Olympics was held in Beijing on Friday night, February 4th. Social media users described it with these words: amazing, flashing and shining.

The main stage of the ceremony in the National Stadium, commonly known as the Bird’s Nest, is designed to be like a huge Chinese character “Zhong”, covering almost the whole stage. In fact, it is the world’s largest ground LED screen. The screen, with a size of 10,552 square meters, was actually made up of about 42,000 small LED units. The huge ground screen, together with a 10-meter-high vertical (竖的) screen, allowed the audience to have a wonderful experience.

To build such a big ground LED screen wasn’t an easy task. As the main stage, on which all performances and the Parade of Nations (入场式) took place, it had to be strong, water-proof (不透水) and able to support heavy weights. What was more challenging, as the stadium is open-air, the ground screen had to be able to support the winter freezing temperature, as well as weather like rain and snow. To solve all the challenges, technicians built a special protective covering for it.

With the help of AI, 5G, AR and naked-eye 3D technologies from the company CALA, which once offered them to the 2008 Beijing Summer Olympics opening ceremony, the ceremony presented many amazing moments. The most unforgettable moment is when the Olympic Rings were “carved (雕刻) out” of a 3D shaped like a block of ice on the screen. Another great point is that children sang and danced across the stage, when stars appeared on the screen under their feet.

Thanks to the screens, creative ideas and high technologies, the two-hour ceremony only needed around 3,000 excellent performers, compared with 15,000 during the 2008 Beijing Summer Olympics opening ceremony. It greatly meets the theme of energy saving.

Thomas Bach, the president of IOC believed that the 2022 Olympic Winter Games would be “in safe hands” when Beijing won the right to host the 2022 Olympic Winter Games in 2015. The amazing ceremony showed the world that China has kept its promise of hosting a fantastic event with strong determination (决心) and confidence.

【小题1】The main stage is ________.

A．the largest vertical LED screen	B．similar to “Zhong” in Chinese
C．covering the edge of the stadium	D．about 10,552 meters in height

【小题2】Technicians built a special protective covering for the ground screen because ________.

A．it had to be able to support the freezing temperature, rain and snow

B．it had to be allowed the audience to have a wonderful experience.

C．it was designed to be like a huge Chinese character “Zhong”

D．it was actually made up of about 42,000 small LED units

【小题3】The underlined word “them” refers to ________.

A．the technologies the ceremony used	B．the moments the ceremony presented
C．the screens that were served for the kids	D．the rings that were “carved out” of the ice

【小题4】What can we infer from the last paragraph?

A．Excellent performers played quite an important role in energy saving.

B．Bach promised the Games would be safe when Beijing made the right.

C．China made a great effort to achieve a victory of the opening ceremony.

D．The ceremony was such a creative one that more performers attended it.

【小题5】What’s the main idea of the passage?

A．The high technology opens up a new field in China.

B．The LED screen brings a big surprise for the world.

C．The opening ceremony is a difficult task for Olympics.

D．The 2022 Winter Olympics presents amazing memories.