Most of the world’s rice is grown in the tropical _______.

A. section        B. location        C. district          D. zone   

Most of the world’s rice is grown in the tropical _______.

1. A.
   section
2. B.
   location
3. C.
   district
4. D.
   zone

A long time ago, before human beings lived on the earth, little coral polyps（水螅）settled around tropical （热带的）coastlines and constructed corals. Over a long period they created lots of reefs. Yet, pollution, climate change and commercial fisheries are limiting the chance of future generations knowing or seeing many of the reefs and sea creatures that exist. Hence, take action to dive now and you can explore the underwater world.
Commercial underwater diving began in ancient Greece. Diving in general means that the whole body is completely in water. On that account there are lots of exciting and quite adventurous ways to dive, like shark cage diving, scuba diving（戴水肺潜水）and reef diving.
There are great coral reefs all over the world, but usually they are situated in warm, clear water such as the Pacific and the Indian Ocean, where they grow best. This is why there are no coral reefs on the west coast of South Africa. However, South Africa’s east coast offers much brightly coloured sea life.
In South Africa more than 100,000 dives a year are made just in coral reefs, which are one of the natural wonders of the world. To see the whole beauty of the reef the right diving gear（设备） is an essential requirement. This means a perfect fitting diving mask and fins, as well as a snorkel（呼吸管）and a friend. Diving alone is dangerous because there may be strong currents you are not aware of, and it’s a lot more fun to share the experience with someone. However, before you can explore the deeper sea, a certificated and checked scuba, a wetsuit and of course a license will be needed. Whether you choose the snorkel or the scuba to spot the colourful underwater world, try to touch as little as possible, be careful with the corals and don’t strike the fishes, because the complex ecosystem is very sensitive.
【小题1】The following factors probably affect coral reefs EXCEPT ________.

A pair of twin-brother ligers, a rare lion-tiger hybrid(杂种), have become superstars in China's southernmost island province of Hainan after becoming the first ligers in the country to reach their first birthday.
Tens of thousands of tourists visited the liger brothers at Hainan Tropical Wildlife Park during the week-long May Day holiday that ended on Sunday, hoping to catch a glimpse of the rare animals. At least 10,000 people signed a red banner when the park celebrated the liger's birthday on May 2. People expressed the hope that the twins would be strong and healthy, the Hainan Daily reports. Zookeepers even made the twins a special birthday cake out of beef and eggs.
The ligers, born on May 2, 2005 , are named 'Ping Ping' and 'An An', which together translate as 'safe and sound'. Their mother Huan Huan is a six-year-old tigress and their father is a four-year – old lion named Xiao Erhei.  The couple first gave birth to a liger in June 2004 but the cub (幼兽)  died of respiratory(呼吸的）failure 72 hours later.
The pregnancy (怀孕) rate for lion-tiger couples is only between one and two percent and the cubs normally have a short life expectancy due to the differences in their chromosomes(染色体). Zoologists say only six to eight ligers are living in the world. China's first tiger-lion hybrid cub was born at Hongshan Zoo in Nanjing, capital of east China's Jiangsu Province, in 2002. But it died a week later.
Ping Ping and An An have broken the survival record set by a liger who lived for 113 days at Hongshan Zoo.
1. Why can Ping Ping and An An become superstars?
A. Because they are the most beautiful ligers.
B. Because they are the cleverest ligers.
C. Because they are the most attractive ligers.
D. Because they are the first ligers to live for a year.
2. Why can't ligers live long ?
A. Because their chromosomes are different.
B. Because they are too small when they are born.
C. Because their parents don't live long.
D. Because they are short of food.
3. How many ligers did the passage mention?
A. Three.         B. Four.          C. Five.         D. Six.
4. What is the best title of this passage?
A. China's longest living twin ligers celebrate their lst birthday
B. Why can't ligers in the world live long
C. How to raise ligers safely
D. The story behind the ligers

2010 was the year the Earth struck back.
Earthquakes, heat waves, floods, volcanoes, super typhoons, blizzards (暴风雪), landslides and droughts killed at least a quarter million people in 2010 – the deadliest year in more than a generation. More people were killed worldwide by natural disasters this year than have been killed in terrorism attacks in the past 40 years combined.
“It just seemed like it was back-to-back(接二连三) and it came in waves,” said Craig Fugate, who heads the US Federal Emergency Management Agency. It handled a record number of disasters in 2010.
“The term “100-year event’ really lost its meaning this year.”
And we have ourselves to blame most of the time, scientists and disaster experts say.
Even though many disasters have the ring of random chance, the hand of man made this a particularly deadly, costly, extreme and strange year for everything from wild weather to earthquakes.
Poor construction and development practices make earthquakes more deadly than they need be. More people live in poverty in vulnerable buildings（危房） in crowded cities. That means that when the ground shakes, the river floods, or the tropical cyclone hits, more people die.
Disasters from the Earth, such as earthquakes and volcanoes “are pretty much constant,” said Andreas Schraft, vice president of catastrophic perils for the Geneva-based insurance giant Swiss Re. “All the change that’s made is man-made.”
The January earthquake that killed well more than 220,000 people in Haiti is a perfect example. Port-au-Prince has nearly three times as many people – many of them living in poverty- and more poorly built shanties(棚户区) ,than it did 25 years ago. So had the same quake hit in 1985 instead of 2010; total deaths would have probably been in the 80,000 range, said Richard Olson, director of disaster risk reduction at Florida International University.
Climate scientists say Earth’s climate also is changing thanks to man-made global warming, bringing extreme weather, such as heat waves and flooding.
The excessive(过多的) amount of extreme weather that dominated 2010 is a classic sign of man-made global warming that climate scientists have long warned about. They calculate that the killer Russian heat wave – setting a national record of 111 degrees – would happen once every 100,000 years without global warming.
Data show that 18 countries broke their records for the hottest day ever.
“The Earth strikes back in response to bad human decision-making,” said Debarati Guha Sapir.” “It’s almost as if the policies, the government policies and development policies, are helping the Earth strike back instead of protecting from it. We’ve created conditions where the slightest thing the Earth does is really going to have a surprising impact.” White House science adviser John Holdren said we should get used to climate disasters or do something about global warming. “The science is clear that we can expect more and more of these kinds of damaging events unless and until society has sharply reduced the amount of heat-trapping gases and particles(颗粒).”
【小题1】From paragraph 1 to paragraph 3, we learn   ___________________________.