It was a cold, wet day on June 6th, 2007, when 14-year-old Wasana arrived at school. Waiting outside his classroom for his classmates to 　 31　 ,Wasana stared at the 　 32　 ,then his eyes fell upon the 18-metre-high hill that 　 33　 at the back of the classroom.

He 　 34　 large amounts of rainwater flowing down the hill, and water was also bubbling at the base of a rock on the hill. For a few minutes, Wasana 　 35　 the water, wondering why it looked so 　 36　 . Then it hit him—the 　 37　 was similar to the video he was shown during Disaster Management classes. Fearing a 　 38　 disaster, he shouted 　 39　 at the students waiting outside their classrooms. “Run, run, don’t stay here! The 　 40　 on the hill is going to fall on us! ”

Chaos broke out as the 　 41　 ran to the open area that had been appointed as an emergency gathering point. When some teachers 　 42　 Wasana, he showed them the water gushing from the hill, and they started leading the students to safer ground.

Just then Principal Gurusinghe drove into the school. Wasana ran over to tell him what was happening. After 　 43　 the site, Grrusinghe knew the school was in　 44.　 The enormous rock at the top of the hill could come crashing down 　 45　 .

　 46　 a group of teachers and older students Gurusinghe climbed the hill and tried to make the water flow away from the rock. They were too 　 47　 : ten minutes later, they heard screams as the huge rock rushed down the hill. There was little Grrusinghe and his group could do as they watched the earth 　 48　 their classrooms. Thanks to Wasana’s 　 49　 action and careful observation, 　 50　 was hurt in the accident.

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　14 years ago, the nine million citizens of London heard sirens(警报) all over the town．Emergency（紧急）services, the fire brigade, the 　1　 , hospitals and ambulances（救护车）stood by ready to go 　2　　 　action．In railway and underground stations, people 　3　　 　posters and maps telling them 　4　　 　to go and what to do in the emergency．This was 　5　　 　Floodcall．London wasn't flooded 　6　　 　．But it is 　7　　 　that it will be．

　In 1236 and 1663, London 　8　　 　．In 1928 many people 　9　　 　in Westminster, the heart of 　10　　 　, drowned (淹死) in floods．And in 1953, 100 people living on the eastern edge of the London suburbs(郊区)were 　11　　 　again in the floods． 　12 　, the Greater London Council（会议）is taking action to 　13　　 　this terrible accident happening again． 　14 　the flood wall will not be built 　15　　 　the 1980s．And in the meantime, Londoners 　16　　 　be prepared．When it 　17　　 　, 50 undergound stations will be 　18　　 　water．Electricity, gas and phone services will be out of 　19　　 　．Roads will be impossible．It will be impossible to 　20　　 　any of the bridges between North 　21　　 　South London．Imagine London will 　　 22　　 like Venice(威尼斯)．

　But the floodcall didn't 　23　　 　panic (惊慌) among Londoners．Most people knew it was just a 　24　　 　．One comment from a lady who was walking along the Embankment when the sirens sounded was, “It's a flood warning, isn't it? The water doesn't look 　25　　 　me．”