Some people support the idea that the ad------------ of vehicle driverless technology are to make travel safer (because of the removal of human error factors), re-------- traffic pressure and reduce environmental pollution. Others ob---------- that sometimes driving makes people feel comfortable and wi-------------- to commit their lives. Unmanned driving technology has to solve many problems. Driver er-------- also have their negative advantage, that is, human judgment. Unmanned driving technology always takes the protection of vehicles and people in vehicles as the first pr-----------------. A driver may prefer to sa--------------- his car to protect others.