根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Every year, natural disasters affect about 250 million people and global warming is making droughts and floods more common. But we can reduce the number of people who die in them.
In Bangladesh, a lot of people have to live on flat and near the sea, but the cyclones (旋风) there bring terrible floods. In 1970, Cyclone Bhola killed at least 300,000 people. In 1991, the even stronger cyclone Gorky hit the country. This time, people could use special school buildings as emergency shelters. Unfortunately, many women and children didn't go to them and around 140,000 people drowned.
After this, villages set up groups of emergency volunteers and teachers had to talk to children every week about the things which they should do if there was a cyclone warning.
It came in 2007. Twelve hours before cyclone Sidr reached land, a Bangladesh scientist in the USA calculated (计算) the exact areas of danger on a computer. The emergency volunteers in the villages spread the warning fast.
"You must come to the school now," they shouted. "You won't be safe if you stay here." All the buildings in the village were destroyed in the cyclone except for the school shelter.
Not everyone in Bangladesh was so lucky. But this was a much smaller number than in the big cyclones of the twentieth century. With modern technology, planning and education, we don't have to lose huge numbers of lives in natural disasters.
A. Sadly, we can't stop the disasters.
B. Four thousand people died in cyclone Sidr
C. Heavy rains, too, contribute to the total cyclone damage
D. They didn't have to wait many years for the next big cyclone.
E. It was one of the worst natural disasters of the twentieth century.
F. Ten-year-old Rupa and her friends ran to all their neighbours' homes.
G. A tropical cyclone can be up to six miles high, and hundreds of miles wide.