B．The Way of Learning Languages

C．The Method of Using Dictionary

D．My Good Reading Habits

　　There was a lot of news related to artificial intelligence，or AI，and machine learning．Among the stories were two dealing with direct competitions between humans and machines．

　　In one competition，machines that used AI performed better than human beings in a high level reading test．Two natural language processing tools beat human in the experiment．One of the tools was built by the American technology company Microsoft．The other was created by Chinese online seller Alibaba Group．

　　In another competition，a computer took on humans in live，public debates．The event demonstrated how AI-powered computers are increasingly being developed to think and sound like humans．The organizer of the debates，U．S．technology company IBM，announced split results．It said a majority of those watching said they felt the machine had done more to improve their knowledge of the subject．But，the human got more praise for communicating their ideas．

　　This year，we also explored the many ways AI and machine learning are flow being used．For example，some U S．judges use machine learning systems to help them decide when，and for how long，criminals should be jailed．The system uses computers to examine data from thousands of court cases．

　　One fast-growing area of AI is facial recognition，which is increasingly being used for security purposes．Recently，Atlanta's Hartsfield-Jackson airport became the first in the U．S．to permit passengers to use facial recognition technology to get on flights．A Chinese company showed off an AI system it developed to recognize individuals by body shape and walking movements．The system is already being used by Chinese police in Beijing and Shanghai．

　　In addition，machine learning was used during 2018 to predict results of the World Cup soccer competition．The technology also created artwork that sold for a large amount of money．And it is being used to help farmer save time and money，while reducing environment-harming chemicals．Other technology systems are being used to follow farm animals and wildlife to collect information on their activities．

28．Why were the two competitions mentioned in the passage?

A．To show how much better AI and machine learning are than humans．

B．To prove AI and machine learning got more praise for communication．

C．To show how powerful AI and machine learning are．

D．To prove AI and machine learning have been used in the work of U．S．judges．

29．What are facial and body recognition systems used for in the passage?

A．Knowledge learning． B．Safety contro1．

C．Office automation． D．Tracking survey．

30．What can we infer from this passage?

A．AI has been widely used in every person'a daily life．

B．Human can be replaced by AI in future completely．

C．More attention is being paid to AI in every part of the world．

D．More advanced AI is helping people in more and more areas．