听下面一段短文,回答以下小题。
13. How can people operate a self-driving car?
A.By calling the operator. |
B.By pressing some buttons. |
C.By telling the car their destinations. |
14. Where do self-driving cars mainly appear?
A.In Chicago. | B.In California. | C.In Los Angeles. |
15. Why did the police order the Google car to stop?
A.It broke the law. |
B.It hit another car. |
C.It broke the speed limitation. |
16. How far have self-driving cars driven?
A.About 2 million kilometers. |
B.About 9 million kilometers. |
C.About 19 million kilometers. |