题目内容：

It was a shock and a painful lesson for many people when the police announced the cause of a bus accident in Chongqing on Oct 28. Video footage (片段) from inside the bus suggested that after a passenger missed her stop and asked the driver to stop, but he refused. She began hitting him over the head with her cell phone. During the conflict, the driver lost control of the bus and it jumped into the Yangtze River, causing 15 deaths.

Zheng Chuankai, a lawyer in Beijing, said the accident showed that it was important that those who cause danger to public safety face severe punishment. Such attacks are inhuman but common. In fact, it is not rare to hear of passengers attacking bus drivers in China. This month, a local court in Shenyang, Liaoning province, sentenced three people to up to three years in prison for endangering public safety by distracting bus drivers, Xinhua reported. “Passengers who interfere (妨碍) with bus drivers are endangering public safety, which is equal to serious crimes like arson (纵火) and poisoning.” Liu Changsong，a Beijing lawyer, told the Global Times.

To prevent similar cases from happening, many Chinese cities have taken measures to keep bus drivers safe. Dozens of cities including Beijing, Xi’an, Wuhan, Changsha and Nanning have plans to add safety fences to buses to protect drivers from any interference by passengers.

The bus operator in Quanzhou, Fujian Province, has invited psychologists to teach drivers how to manage their emotions when facing an angry passenger. These measures are necessary, but they are not enough.

“Public security is closely connected with social morality (道德). People should obey the law, be more self-disciplined and sensible.”

Many countries have introduced measures to deal with the problem of violence against bus drivers. On every bus in the US state of New Jersey, a sign on the back of the driver’s seat warns passengers that anyone attacking a driver can be fined or put into prison.

In London, the local government has launched a program to train drivers to deal with angry passengers and avoid potential conflicts.

1.How did the police find out the cause of the accident?

A. From the witnesses to the accident.    B. From the recorded video in the bus.

C. From the survivals of the accident.    D. From the police’s reasoning.

2.What does the second paragraph mainly talk about?

A. Interfering public safety is a serious crime.

B. Being a bus driver is a dangerous job.

C. Arson and poisoning are very common in the society.

D. It’s important to know how to protect a bus driver.

3.What’s the author’s attitude towards training drivers to avoid conflicts with passengers?

A. Supportive.    B. Doubtful.

C. Opposed.    D. Uncaring.

4.Which of the following can be the best title for the text?

A. A Terrible Traffic Accident.

B. A Bus Jumping into the Yangtze River.

C. Keeping Away from the Dangerous Bus.

D. Attack on Bus Driver Brings Safety Review.