Artificial intelligence（人工智能），or AI in short， is the science of giving computers and machines ability to think and work like humans． AI scientists and engineers have made a lot of cool technologies．

     AI is rapidly catching up with the human ability to read faces． As a result， facial recognition （识别）is used a lot in the world． Chinese police use this technology to identify criminals（罪犯）． Once they caught a criminal when he attended a concert． It also checks the ID of ride﹣hailing（网约车）drivers and lets people pay for things with a smile．

     AI is also used in self﹣driving cars， which are believed to be the future of driving． Most drivers may wave or nod at passers﹣by to let them cross the street， but self﹣driving cars dont have this ability． Carmakers are testing a light signal system to help them"speak"to humans． The system can show what self﹣driving cars will do． For example， if a driverless car is yielding（让路）， it will lash two white lights side to side． A rapidly flashing light tells passers﹣by that the car is about to speed up

     Service Robots also show you how powerful Al is． Imagine this﹣you come back home from school and your robot housekeeper is waiting for you at the door． After dinner he teaches you to play the piano，just like a real music teacher． Such thoughts will soon happen in the real world． In the future． more and more service robots will become good home helpers

     AI is so powerful that it can help human beings and even replace us in many jobs

（1）What does the underlined word identify mean in the passage？　　

      A． To let somebody know his mistakes．

      B． To come to realize and tell who is who．

      C． To take somebody to the police station．

      D． To inform somebody of something important．

   （2）According to the passage， what is facial recognition used for？　　

      A． Driving cars．

      B． Making people smile．

      C． Calling the police．

      D． Checking people's information．

（3）Which technology has been used in rea1 life according to the passage？　　

      A． Service Robots at school．

      B． Robots as ride﹣hailing drivers．

      C． Facia1 recognition for payment．

      D． Light signals for self﹣driving cars．

（4）What can we learn from the passage？　　

      A． People use AI in many different ways．

      B． AI will take the place of human beings in all jobs．

      C． Self﹣driving cars will be able to talk like humans．

      D． A criminal was caught for inventing facia1 recognition．