A．Pleaseremembertoprotectyoure-优题课

The Internet is shaping our lives． We already have online shopping services and mobile payment． However， this is just a start． The worlds 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（会议）． 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 your smile is， the more discounts（折扣） you will get． Payment is done automatically（自动地） through your Alipay（支付宝）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 voices 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 Xiaolce can not only provide useful information， but also chat with people like a real friend． Xiaolce 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． Sougou brought its lip﹣reading system to the conference．

D． If you smile， it will give you a special discount for your goods．

E． Another type of AI focuses on understanding human emotions．

We can't remember clearly when we started to take our mobiles to the dinner table． This often，（1）　　（ especial） when we eat out． Once a dish comes，（2）　　 of lifting our chopsticks， we take out our mobiles and click． Later， we post the photos onto Weibo or WeChat，waiting to be "liked"． Then we check our mobiles from time to time during the meal to see whether we get"liked" （3）　　 not． We just cannot leave our mobiles for only a meal．

Does that sound familiar to you？ Do you do that often？ If not， how do you feel when others do that while having dinner with you？

A recent study suggests that what we are used to （4）　　（ do） is not so good． Spending time taking photos of food makes the food less pleasant． To test this， some researchers did an experiment． Some people were （5）　　（ask） to take photos before they could enjoy food． As a （6）　　， it showed that the （7）　　（many） photos they took， the less delicious the food （8）　　 to them． Why not stop taking photos and just enjoy the food in front of you？

So， next time you go out to have dinner with your family or friends， how about not （9）　　（ take） photos of food？ Let the food be delicious as it is and share your life with people （10）　　 you． Trust me， and it will be a wonderful time．

March 22nd is World Water Day．It started in 1993．It not only makes us think about the importance of water，but also calls on （号召） us to （1）　　and protect water．Today，we're facing terrible water problems．Among them，wastewater problem is especially（2）　　．And the subject of World Water Day in 2017 is"wastewater"．

What is wastewater？It is used water．Usually，wastewater comes from homes，（3）　　，hospitals and so on．It is produced by different kinds of activities，including washing the machines，taking showers and using the kitchen．The rain also（4）　　wastewater when it is running down the street during a storm．No matter where it comes from，this kind of water is sure to have（5）　　harmful in it．

（6）　　must we treat （处理）wastewater？Wastewater has a big influence on our life．It causes both illness for us and pollution for the environment．We must care for our environment and our own （7）　　．

How can we treat wastewater？Different kinds of wastewater need different ways of treatment．Wastewater（8）　　homes can be reused．Then there will be（9）　　wastewater．Also，factory wastewater has to be cleaned（10）　　it goes back to nature．

1．A．drink	B．save	C．carry	D．watch
2．A．easy	B．popular	C．small	D．serious
3．A．factories	B．lakes	C．rivers	D．seas
4．A．gets back	B．hands in	C．changes into	D．picks up
5．A．nothing	B．something	C．nobody	D．somebody
6．A．What	B．Who	C．Why	D．How
7．A．work	B．interest	C．health	D．business
8．A．on	B．for	C．with	D．from
9，A．less	B．more	C．better	D．worse
10．A．and	B．whether	C．after	D．before

I don 't know the man． The man is talking with our headteacher（改为含有定语从句的复合句）

I don't know the man　　 talking with our headteacher．

Lucy' s mother often makes her read English aloud at home．（改为被动语态）

Lucy is often made　　 English aloud at home．