题目内容：

Some people were killed when a huge explosion hit an industrial area of China, injuring hundreds of people. The explosion is believed to have come from a shipment of explosive inside a warehouse at about 11:30 pm local time (5:30pm in Britain) in the north-eastern city of Tianjin.

Videos of the accident showed fires lighting up the night sky, raising dust dozens of feet into the air, and people nearby said the explosion had broken windows. Tianjin resident Zhang Siyu, who lives several miles away from the accident site, said, “I thought it was an earthquake, so I rushed downstairs without my shoes on. Only once I was outside did I realize it was an explosion. There was the huge fireball in the sky with thick clouds. Everybody could see it.”

Post on Chinese social network Weibo showed a fireball shooting into the air and as least two separate explosions, while photos showed people in the street apparently covered in blood. Others image showed children being carried in blankets to safety.

It was reported that the two explosions happened within 30 seconds of each other and about 100 fire trucks were sent to the scene, with most of the injuries caused by broken glass and stones. The firm running the warehouse was named by local media as Ruihai Logistics. The company says on its website that it was set up in 2011. It says it handles one million tons of cargos（货物） per year.

The National Earthquake Bureau reported two major explosion before midnight local time---the first with an amount of 3 tons of TNT（三硝基甲苯）, and the second with an amount of 21 tons. Six thousand firefighters brought the terrible fire under control, although it was still buring . It was reported that the firefighters were combing （梳理）the neighborhood for the possible injured.

1.When did the fire break out by Beijing time?

A. At 11:30 am           B. At 11:30 pm

C. At 5:30 pm            D. At 5:30 am

2.What did Zhang Siyu do first when hearing the explosion?

A. He recorded videos of the big accident.

B. He posted what he saw online as soon as possible.

C. He called the firefighters when he went out.

D. He ran downstairs as soon as possible.

3.How might most people know the accident first?

A. In the newspaper.       B. By the radio.

C. From the Internet.       D. In the textbook.

4.What can we learn from the last paragraph?

A.Thousands of firefighters worked hard to save people.

B. Thousands of firefighters had tried to put out the great fire.

C. There wetre thousands of people injured in the big accident.

D. There were thousands of cargo missing in the great disaster.