二、阅读理解
第一节:根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
The Qinghai-Xizang Plateau is known as "the roof of the world". It is the highest plateau in the world.
Though the weather conditions are not the same in different areas of the plateau, they have something in common. The sunshine is strong and the temperature is low. It helps stop the cold wind from North Asia coming into South Asia.
The Qinghai-Xizang Plateau is famous for its beautiful scenery. Mount Qomolangma stands on the southwest of the plateau. Besides, both the Yellow River and the Yangtze River start there and run towards the east. The plateau has rich natural resources. Many of them can be used as Chinese medicine.
With new technology, the plateau has been developing fast these years. In 2019,a 5G base station was built on the plateau. In 2023, the Fuxing high-speed train series has been running on the Qinghai-Xizang Railway's Xining-Golmud section. It can travel at a speed (速度)of 160 kilometres per hour, which cuts down the travel time.

21.E 22.B 23.D 24.C 25.A

【分析】
本题为英语阅读理解七选五题型，解题思路是：先通读全文把握文章围绕青藏高原展开的核心内容，再逐一分析每个空格前后的关键信息，结合语篇逻辑、语义连贯性匹配对应选项。
【解析】
21. 空格前介绍青藏高原是世界最高高原，E选项“它覆盖约250万平方公里的面积”是对高原的进一步介绍，符合语境，故选E。
22. 空格后提到高原不同地区气候有共同点，且后文说明阳光强、温度低，B选项“空气通常干燥稀薄”是高原气候的共同特征，衔接后文的气候描述，故选B。
23. 空格前指出高原以美景闻名，D选项“它展现了雪山、绿色森林、草原、奔跑的山羊和飞鸟的壮阔画面”具体描述高原美景，承接上文，故选D。
24. 空格前说明高原拥有丰富自然资源，后文提到很多资源可作中药，C选项“有各种野生植物”属于自然资源，且与后文中药用途衔接，故选C。
25. 空格前提到2019年在高原建了5G基站，A选项“5G服务让当地人的生活更便利”承接5G话题，符合语境，故选A。
【答案】
21.E 22.B 23.D 24.C 25.A
【知识点】
英语七选五、语篇衔接、语境理解
【点评】
本题考查学生对语篇逻辑和上下文语境的把握能力，解题需关注空格前后关键信息，匹配语义连贯的选项，整体难度适中。
【难度系数】
0.5