Autonomous vehicles have become one of the most talked about modern technologies.These are cars that can guide themselves without human input.They were used sensors and software to control and drive the car.
   The benefits of autonomous vehicles are far-reaching.They promise（承諾）to improve road safety. "With autonomous cars，we can envision（預(yù)見(jiàn)） a future with far fewer traffic casualties（傷亡）." said Dr.James，a professor studying transportation systems.According to a study，over 90% of car accidents are caused by human errors，which self-driving cars can reduce.Researchers estimate（估計(jì)） autonomous vehicles could save hundreds of thousands of lives in the next decades by avoiding accidents.
   But there is still major technical difficulty.Autonomous vehicles must be able to perceive（感知） and understand their surroundings using cameras and sensors.Their decision-making ability remains limited compared to human drivers.Many scenarios（場(chǎng)景） on the roads still confuse autonomous cars.
   On the other side，the high costs of autonomous vehicles and sensors remain a barrier for widespread adoption（采用）. "For ordinary consumers，current self-driving cars are still too expensive." said an automotive market analyst.
   Now，several companies are racing to bring self-driving cars onto the roads.Waymo has been testing autonomous taxis in Arizona. "Our goal is to rollout our fully autonomous ride hailing（打車） service to more cities." said John，the CEO of Waymo.Tesla continues to improve its autopilot feature.But fully autonomous consumer vehicles are still years away.
   The future of autonomous driving will likely involve collaboration（合作） between humans and machines.While self-driving technology continues to evolve（發(fā)展），human oversight can handle exceptional cases. "It may take decades before autonomous cars can drive as intuitively as humans in all conditions." said an industry expert.With human-machine teamwork，autonomous vehicles will gradually become a reality that transforms how we get around.
（1）The underlined word "Autonomous vehicles" in Paragraph 1 is close in meaning to

A

A

.
A.driving without human
B.driving without machine
C.driving without wisdom
D.driving without
（2）What causes trouble for autonomous vehicles？

C

C

.
A.Traffic rules and regulations
B.High making costs
C.cameras and sensors
D.Limitations in technical capabilities
（3）Which of the following statements is true according to the passage？

B

B

A.Autonomous cars can completely replace human drivers now.
B.Many road conditions are still challenging for self-driving cars.
C.Tesla has rolled out fully autonomous vehicles.
D.Autonomous vehicles provide no benefits for safety.
（4）What is the author's attitude toward autonomous vehicles？

B

B

.
A.Confident
B.Hopeful
C.Doubtful
D.Uncertain