Read the article and select the best answer. Article: At Institute for the Future, game designer Jane McGonigal creates massive multi-player free online role-playing games (MMORPGs), which focus on social changes and environmental problems. She hopes that players will use their new skills to make the real world better. According to Jane, our addiction to gaming is actually a great thing, so long as we use it properly.Speaking at the TED (Technology/Entertainment/Design)2010 Conference, Jane says that people should devote more time to games to build the skills necessary to make the world better.People who take part in MMORPGs develop specialized skills in problem-solving as a team.So, if gamers are willing to take part in role-playing games based on real-world problems,they will be able to work together to find ways that can be used in the real world. Jane focuses on creating the kinds of video games that enable players to make a difference in their own lives and the lives of those around them.In 2007, she helped create a video game called A World Without Oil, in which 1, 800 players tried to find new ways to transport themselves in a world without oil.Even after completing the game, the players focused on the problem and its possible solutions.Her next game, Evoke, takes an even more practical way.Game players are mainly young people in Africa.They will learn to create a business that will help stop problems such as poverty and AIDS on a local level.By the end of the game, players will be guided by experts on how to start their own businesses. "We can make any future we imagine and we can play any games we want," she said at the TED Conference."So let the world-changing games begin." Question: The MMORPGs are created by Jane McGonigal to _ . Options: A: give gamers more chances to play online games B: develop gamers' problem-solving skills C: help gamers get used to social changes D: make gamers take proper attitudes towards games
B

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Read the article and select the best answer. Article: If you are afraid of the dark,it's not a big deal.It's perfectly normal to feel afraid After all,animals do too. "Fear matters,"says Karen Warkentin,an ecologist."It's a good thing," she adds, "because fear makes you do things that keep you alive." Like kids,many animals experience fear and they respond to the feeling in variety of ways.A frightened turtle pulls its head and legs inside its shell.A small fish will swim away when a big,hungry fish approaches. Some animals respond to fear in ways you might not expect.The first example is that the fear of being eaten can scare some frogs right out of their eggs. Warkentin made the surprising discovery while studying red--eyed tree frogs in Costa Rica. In this species,female frogs attach jellylike clumps of their eggs to the undersides of leaves.The leaves hang on branches that dangle over ponds.After they hatch from the eggs,the tadpoles then fall into the water,where they eventually grow into adult frogs. Tree frog eggs usually grow for 6 days before hatching.If they sense that a hungry snake is about to attack,however,they can hatch up to 2 days ahead of schedule. As the snakes are unable to swim,by falling into the water early,the tadpoles can escape. If hatching early helps protect red--eyed tree frogs from snakes,you might wonder why their eggs don't always hatch sooner.It turns out that hatching early brings its own danger.Once tadpoles land in the water,hungry fish and other animals like to eat them too.Staying in their eggs for a full 6 days,then,allows frog embryos to grow big and strong.This extra growth improves their chances of surviving in the water. Question: It can be inferred from the passage that fears _ . Options: A: help animals grow bigger and stronger B: are less common among young animals C: help animals move a lot to fit the environment D: are more or less important in order for animals to survive
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D

Read the article and select the best answer. Article: Dogs can be worried and pessimistic just like people, researchers report in a new study in Current Biology. And they aren't talking about basset hounds : those dogs just look as if they expect the worst. What the scientists say is that dogs that exhibit anxiety when left home alone by their owners may have bigger problems -- they may be in a permanent bad mood. This pessimistic outlook may not otherwise be easily apparent in a dog's other characteristics, like running speed or learning ability, the study reports. Dogs are similar to humans in the role that emotional state plays in decision making, said Michael Mendel, a veterinary scientist at the University of Bristol and the study's lead author. The study's researchers looked at 24 dogs in shelters in Britain. They placed the dogs in isolated settings and observed their reactions -- many barked, jumped on furniture and scratched at the door. Then they placed bowls in two rooms. One bowl contained food, while another was empty. After training the dogs to understand that bowls can sometimes be empty, and sometimes full, they began to place bowls in ambiguous locations. Dogs that quickly raced to the locations were more optimistic, and in search of food. Those that did not were deemed pessimistic. The more separation anxiety a dog expressed while in isolation, the more likely the dog was to have a pessimistic reaction, the researchers found. The study carries an important message for dog owners, Dr. Mendel said. Dogs that express serious anxiety when alone may need treatment, as it could be a sign of unhappiness and instability. Question: What can we learn from the passage? Options: A: Dogs will be optimistic as long as they are left alone. B: Dogs must be in a permanent bad mood when their owners left. C: Dogs that express anxiety don't need treatment. D: Dogs may easily show their pessimistic outlook in learning ability.
D