Read the following article and select the best answer. Article: Earlier this month, two rock climbers achieved what many thought impossible: They climbed up the 3,000-foot-high Dawn Wall in Yosemite National Park without specialized equipment. Climbing without this equipment is called"free-climbing."Until now, no one had free-climbed to the top of the rock face, which is a part of the mountain EI Capitan. El Capitan, which means"the captain"or"the chief"in Spanish, has always presented a challenge to climbers. But the Dawn Wall, on the mountain's southeast face, is a particularly difficult route to the summit . It is a rock formation that is both steep and relatively smooth. This makes free-climbing the rock face seem almost impossible. About seven years ago, professional climber Tommy Caldwell spotted a possible route up the wall. It took years of planning and preparation, but this month, Caldwell, 36, and his friend Kevin Jorgeson, 30, finally make the climb. Free climbers do use ropes and other basic safety equipment to catch them if they fall -- and Caldwell and Jorgeson fell often. Before starting their climb, they broke down their route into 32 sections. Each section was based on a rope length called a"pitch."The rope was secured into the rock face to catch the climbers if they fell. Caldwell and Jorgeson's goal was to climb the Dawn Wall without returning to the ground. If they fell, they had to start that pitch all over again. The two men started climbing on December 27. They slept in hanging tents, and a team of friends brought them food each day. The men had spent years rehearsing the movements it would take to get through each pitch. They made it through the fist half of the climb relatively easily. But halfway up, Jorgeson ran into trouble. In one difficult spot, he fell each time he attempted to climb. After 10 days of trying, Jorgeson finally made it to the next pitch. Getting through that troublesome pitch gave both climbers renewed energy. They finished the rest of the climb five days later, on January 14. Question: What can we learn about this world,s toughest climb? - It includes 32 different routes. - It is also the world ,s highest climb. - It was once completed by Caldwell 7 years ago. - It took the two climbers 19 days to get to the top.
It took the two climbers 19 days to get to the top.

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Read the following article and select the best answer. Article: As wild animal lovers are not content with watching tigers and gorillas during the day, a growing number of zoos in the US are offering a more thrilling after-dark experience -- overnight stays. The Philadelphia Zoo is America's first zoo and home to more than 1,300 animals. It has been running its Roars and Snores Overnight Programs for about 20 years. The most popular theme program is the Night Flight Overnight Program where children aged 5 to 12 sleep in the zoo's tree house. The overnight stays are not only popular with young children. Most overnight stays include a night tour during which youngsters experience the mysterious sights and unusual sounds of the zoo. A midnight snack and breakfast are also served. "It is a unique experience to be at the zoo without the crowds and additional noise," explained Patterson, of the Denver Zoo, which has been running its Bunk with the Beasts program since 1998. With nearly 4,000 animals and 700 species the zoo attracts more than 1.8 million visitors a year. "The things you hear and see in the zoo are completely different," said Patterson. On Denver's two-hour tours, night vision scopes are provided so guests can see nocturnal animals such as owls, and indoor educational games increase the learning experience. Patterson said parents tend to be more worried about leaving their children than the children themselves. They have rarely had to call up a parent in the middle of the night. "They love it," Patterson said about the children. "For many, it's their first overnight stay away from home. They are so excited that by the end of the day they are so tired that they have no opportunity to worry." "Guests at the new overnight program at the Queens Zoo make breakfast treats for animals, and watch the keepers feed them to the animals," said Education Curator Tome Hurtubise. The growing popularity of overnight programs has caused zoos that only serve day-time visitors to think again. The Queens Zoo, which started their program this year, is so pleased with its success... Question: The visitors go to the zoo at night mainly because _ . - they have no time during the day - there are too many visitors during the day - they can have a quite different experience at that time - they want to make their dull life exciting
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they can have a quite different experience at that time

Question: Read the following article and select the best answer. Article: One day, around Christmas time, fishermen off the west coast of Peru started on their traditional fishing trip. Much to their surprise, there were no fish! They knew immediately what had happened. Tales from years gone by had told them this was the result of El Nino which sometimes stop fishing for many months! El Nino is a warm _ that comes and goes along the west coast of South America. It got its name from fishermen in Peru more than a century ago. Every few years, they noticed a sudden warming in the normally cool Pacific water where they fished. Because this warming often came about around Christmas, they called it El Nino, which is Spanish for the "Christ Child". Generally, El Nino occurs every three to seven years and lasts only a few weeks to a month or more. El Nino warms the water it flows through. Because the fish and sea birds need cold water to live, many of them die when El Nino comes through. El Nino also causes both floods and droughts. It is believed that El Nino may have caused the 1993 Mississippi and 1995 California floods. And at the same time, it may have caused droughts in South America, Africa and Australia. El Nino has occurred thirteen times within the last fifty years, bringing natural disasters to many countries such as Indonesia and Peru. However, El Nino does not often trouble China. During this period China was badly hit by El Nino only once. In 1998, North China had a terrible drought, while South China was troubled by floods. Question: According to the passage, which of the following is TRUE about El Nino? - It happens in November and December. - It was named by some Spanish fishermen. - It only happens in South America. - It lasts a few weeks or more.
Answer:
It lasts a few weeks or more.