It is （polite） to talk loudly in public places like a library．
If more people give up （drive） cars， the air will get much cleaner．
To achieve our dreams， we must take every life choice （serious）．
The Internet is shaping our lives． We already have online shopping services and mobile payment． However， this is just a start． The world's leading tech companies are planning to build smarter online communities．（1） It was held in Wuzhen， Zhejiang last year． The development of artificial intelligence（AI， 人工智能） was a hot topic at the conference． If a machine can learn and solve problems as humans do， it can be called AI．
The company Alibaba uses AI technology in its unmanned supermarket in Wuzhen． There is no salesperson in the supermarket， just a tablet on a desk that says "please smile"． （2） The bigger you smile， the more discounts（折扣） you get． Payment is done automatically through your Alipay account． When you first enter the supermarket， the supermarket's AI recognizes your face and your account．
There is also AI that can read lips． （3） It recognizes your mouth's movements and turns them into voice or text messages． This could be very useful when you are trying to talk to someone on your phone in a noisy place． Police could also use the technology to help them find criminal suspects by lip﹣reading recordings from video cameras．
（4） Microsoft's chatbot XiaoIce can not only provide useful information， but also chat with people like a real friend． XiaoIce has a WeChat account． After following the account， users can start talking with her． （5） She keeps improving herself by talking with users．
These technologies are being put into wider use． We may see a smarter world and better lives in the near future．
A． She knows when to comfort you or tell jokes．
B． They discussed this at the World Internet Conference．
C． AI technology will take jobs away from humans one day．
D． Sougou brought its lip﹣reading system to the conference．
E． If you smile， it will give you a special discount for your goods．
F． Another type of AI focuses on understanding human emotions．
A： Hi， Jane． Could I ask you a few questions？
B： Certainly．
A： We all know that you're working for an organization that protects the environment．（1）
B： Well， my main job is to help spread the message about protecting the environment． For example， the three R's﹣reduce， reuse and recycle．（2）
A： So what can we do at home to protect the environment？
B： （3） For example， we should use both sides of paper and reuse plastic bags．
A： What can students do at school？
B： （4） So we encourage students to collect waste paper and soft drink cans． Then we sort them so that they can be recycled．
A： （5） Thank you!
B： It's a pleasure．
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A． Wonderful ideas! B． All of them are important． C． We should reduce the waste we produce． D． Can you tell us what you are doing there？ E． What should people do to protect the environment？ F． Recycling can protect the environment and save money． |
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（1） Where are my toys？ （2） Whose books are these？ （3） I think I'll walk to the party． （4） Would you like some more rice？ （5） Have you ever been to the Great Wall？ |
A． They must be Carla's． B． It's under the desk． C． No， thanks． I'm full． D． They're on the sofa． E． If you do， you'll be late! F． Yes． I went there last year． |