题目内容：

    The Ministry of Industry and Information Technology has issued（颁发）commercial licenses（商用许可证） for 5G on June 6,2019, according to CCTV.

Four major telecom carriers —China telecom, China mobile, China Unicom and China Broad casting Network— received the first batch（批） of four 5G commercial licenses, said the report.

As of May, Chinese companies account for more than 30% of all essential patents（专利）related to international standards for 5G, according to a China Daily report.

The next﹣generation technology is expected to be at least 10 times faster than 4G, and its huge function to connect things will enable smart factories, self﹣driving vehicles and other uses, the report said.

China s big three telecom carriers are forecast（预计 ） to spend 900 billion to 1.5 trillion yuan（﹩134 billion to ﹩23 billion ） in total on 5G network construction from 2020 to 2025, according to a report from the China Academy of Information and Communications Technology.

China is set to become the world's largest 5G market by 2025, with 460 million 5G users according to a forecast by the Global System for Mobile Communications Associationan industry group.

1.How many 5G commercial licenses have been issued in China?    

A.One. B.Three. C.Four. D.Five.

2.When did the Ministry of Industry and Information Technology  issue commercial licenses for 5G?    

A.On May 15, 2018. B.On June 6, 2018.

C.On May 15, 2019. D.On June 6, 2019.

3.The underlined phrase "account for" in Paragraph 3 means"     ".

A.own B.explain C.buy D.require

4." The next﹣generation technology"in Paragraph 4 refers to     .

A.3G B.4G C.5G D.6G

5.What's the writer's purpose of writing this passage?    

A.To make people interested in 5G.

B.To explain why Chinese are so proud.

C.To offer information on 5G network construction.

D.To introduce China's new development of science and technology.