问题详情：
Fifteen people were killed and 38 others injured in a road accident early Wednesday morning in Enshi, Central China's Hubei Bus, travelling from Wanzhou in Southwest China's Chongqing Municipality to Shenzhen in South China's Guangdong Province, had 53 passengers on board, three more than permitted.
At around 1 am on Wednesday, the bus increased speed gradually on a curve（弯路）and plunged more than 30 metres into a valley below. Thirteen people, including one of the two drivers, died at once. Two others died on the way to hospital.
Although the cause of the accident is still unclear, the local police said the driver paid no attention to the official warning signs on the expressway. It hit a section which had been closed as a result of snow. Because of the freezing weather and icy roads, the expressway had been closed by police since Tuesday morning. But the bus drivers took the dangerous route, paying no attention to the warnings.
The rescue team, which included more than 30 medical workers and 120 local villagers, joined together and rushed to the scene at the news of the accident. By 5 am, all of the injured had been sent to three local hospitals for emergency treatment. A hospital source said most of the patients were in a stable（稳定的）condition but a few were still in danger.
According to a 2002 national public opinion poll, traffic accidents ranked as people's third biggest security concern.
16. What probably caused the accident?
A. The bad weather B. too many passengers
C. the driver’s paying no attention to warnings D. too fast speed
17. When the accident took place, ___________.
A. the bus was on the way to Shenzhen
B. most of the passengers were sound asleep
C. all the passengers were given immediate rescue
D. it was snowing hard
18. The expressway was closed to ＿＿＿＿.
A. protect the passengers from being frozen
B. make the police have a good rest
C. stop cars traveling around
D. avoid the happening of traffic accidents
passage is about ＿＿＿＿.
A. how a road accident took place B. safety measures
C. a terrifying accident D. the basic rules for safety
20. What is the author’s attitude towards the accident?
A. Subjective(主观的) B. objective(客观的)
C. sad D. angry
【回答】
CADCB
知识点：新闻报道类阅读
题型：阅读理解
