问答题
                                            
      Driverless cars are vehicles that are self-driving and able to navigate (行驶于) the environment without requiring a human. They are also referred to as robotic cars and self-driving cars. Here are some
 facts about driverless cars.                                                                                 
  * They are able to recreate roadways in three dimensions.                     
 * They must recogize pedestrians(行人),road signs, other vehicles, and traffic lanes in order to function.                                                                    
 *A driverless car would be capable of functioning without human intervention (干预) of any kind.         
 * The first driverless car model was operated by Google under Alphabet Inc. in 2015.
 * It has been estimated that by 2050 almost all vehicles on the road willl be driverless.
 * Human error accounts for roughly 90% of accidents on roadways. The creation of driverless cars was in an effort to reduce accidents.             
  * One of the major issues for driverless cars is the weather. When the weather is bad, it results in a huge amount of data that must be processed and it can affect the process. 
 * Diiverless cars could help eliminate the issue of drunk driving.
 1.What are diiverless cars also called?  Robotic cars and _____________ .
 2.What should a driverless car do in order to function on a road?       It must recognize_____________ , other vehicles, and traffic lanes.
 3.When was the first driverless car model operated?  In _____________.
 4.What has been estimated about vehicles on the road by the year 2050?Almost all of them will _____________.
 5.What is mentioned about the issue of drunk driving? Driverless cars could help  _____________