1 . 听下面一段短文，回答以下小题。
1. 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.

2. Where do self-driving cars mainly appear?

A．In Chicago.

B．In California.

C．In Los Angeles.

3. 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.

4. How far have self-driving cars driven?

A．About 2 million kilometers.

B．About 9 million kilometers.

C．About 19 million kilometers.