An east China highway pile-up on April 2^ndhas killed three people and injured 31 others. That day was the first day of a three-day national holiday marking the Tomb-Sweeping Day.

Two people died in a local hospital where nine others are being treated. Another person died after treatment failed in a larger hospital in Wuxi where 22 remain hospitalized， Changzhou traffic police updated on its official microblog account at Weibo.com.

The accident happened at the Changzhou section of the highway linking Shanghai and Nanjing. It drew public attention as people began posting photos and videos on Chinese social media WeChat and Weibo. Images showed dozens of trucks， buses and cars crashed into each other. People were standing on top of the vehicles.

Local police told Xinhua Press that at least two trucks， three buses and 20 cars were involved. Rainy and foggy weather caused poor visibility and slippery roads.

What’s more， it was difficult for ambulances (救护车)to get to the scene of the accident because the life emergency lane was filled with vehicles， which delayed the rescue of the injured.

The Ministry (部长) of Public Security told traffic departments nationwide to keep a look out for vehicles using the emergency lane occupancy.

All highways in China leave the right lane as the emergency lane. Some drivers， however， pay no attention to this rule. Therefore， the police call on drivers to follow the rule strictly and offer the injured more hope of being saved.

The ministry also asked the police to watch the traffic more carefully so as to quickly discover the potential (潜在的) danger. The police have decided to add electronic monitoring instruments to catch the violations (违规者) and heavily fine drivers for it.

On the night of Oct. 29th, 2022, tens of thousands of South Koreans went out to celebrate Halloween. 【小题1】 A crowd of mostly young people started to cram (挤) into a narrow alley (小巷) until it was overcrowded. Videos and pictures on social media showed people struggling to breathe, lying in the streets and on stretchers (担架). 【小题2】 Up till Nov. 13th, 158 people had died. So, how can we learn a lesson from this accident and protect ourselves from similar future events?

【小题5】 Did you know that in a crowd with a density (密度) of more than six people per square meter, people lose control over the movement of their own bodies as the whole crowd can act like water? That means pressure waves can travel through it and cause the whole group to fall at once. Crowd management is simply necessary when it comes to big public events.

The Great Fire of London started in the very early hours of September 2,1666.In four days it destroyed more than three quarters of the old city,where most of those houses were built out of wood and close together.One hundred thousand people became homeless but only few lost their lives.The fire started on Sunday morning.By eight o’clock three hundred houses were on fire.On Monday nearly a kilometer of the city was burning along the River Thames.Tuesday was the worst day.The fire destroyed many well-known buildings.

The fire stopped only when the king finally ordered people to destroy hundreds of buildings in the path(路线) of the fire.With nothing left to burn,the fire became weak and finally died out.