1. (2020·泰兴模拟) 阅读理解

    Shanghai Vice-mayor Wu Qing made the world's first 5G video call on March 30, 2019, in Hongkou, Shanghai.

    Now 5G, fifth-generation mobile communication technology is coming. Compared with 2G, 3G and 4G, 5G is not independent and brand-new. It is further development of present mobile communication technology.

5G makes information break through the limitation (限制) of time and space, providing a more wonderful user experience. It will influence all areas of the society in the future, such as industrial machines, farming equipment，transportation and so on. It's much faster—the 5G mobile network is more than one hundred times faster than the 4G mobile network. It will also realize the general hope of "Get the information whenever you want and all things on earth are at your fingertips".

    In recent years，China has paid great attention to the use of 5G and made great efforts to develop 5G network. China is expected to become the world's largest 5G market by 2025 with 460 million users. The user number in China is expected to be bigger than that of Europe (205 million) and the United States (187 million) combined. Backed by 5G, China's mobile ecosystem (生态系统) is expected to add 6 trillion yuan in value to the national economy (经济) in 2023, up from 5. 2 trillion yuan last year.

1. （1） The lead (导语) in the first paragraph does not include the information of "_______".

   A . Who B . When C . What D . Why
3. （2） Which word in Paragraph 2 shows the relationship between 5G and the other three?

   A . Independent B . Development C . Brand-new D . Mobile
5. （3） Which is the main idea of Paragraph 3?

   A . The advantages of 5G B . The standard of 5G  C . The importance of 5G D . The production of 5G
7. （4） How does the writer prove that China is expected to be the largest 5G market?

   A . Citing (引用) what developers said about 5G B . Predicting (预言) the speed of national economy growth C . Comparing user numbers with Europe and the US D . Looking back at the development of 4G
9. （5） What do we know about 5G according to the passage?

   A . It will bring good results to the economy in China. B . Everyone could make a 5G video call in 2019. C . 5G mobile network is 10 times faster than that of 4G. D . Part of our society will be changed by 5G.