Problem:OPTIONS:
- Hundreds of kinds of animals have disappeared forever.
- Many kinds of animals have died out.
- About 170 kinds of animals have disappeared forever.
- All kinds of animals are in danger.

Read the following article and answer the question. Article: Animals are natural resources that people have wasted all through our history. Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the world forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger. Why should people care? Because we need animals. And because once they are gone, there will never be any more. Animals are more than just beautiful and interesting. They are more than just a source of food. Every animal has its place in the balance of nature . Destroying one kind of animal can create many problems. For example, when farmers killed large numbers of hawks , the farmers' stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied quickly. Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger. Quite a few countries have passed laws. These laws forbid the killing of any animals or plants on the danger list. Slowly, the number of some animals in danger is growing. Question: What has happened to the animals on the earth? Answer:
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A: Many kinds of animals have died out.

Read the following article and answer the question. Article: My 3-year-old son and I lived a very hard life because I had been out of work since two years ago. Being poor is a terrible feeling when your 3-year-old finishes his meal and says: "Can I have some more bread and jam please, Mummy?" And you break down in tears, because you don't know how to tell him that there is no more food. With PS6, I went to the supermarket, picked up some food and started to cook at home. It was time for me to make a change and get back on my feet. I began to write a series of articles for the website named Hunger Hurt in July 2011. A few months later, local food bank gave me some help-- with some free vegetables every month, which made my life a little easier. I began to write recipes , posting them on my blog. To my surprise, families, students and those poor people told me how much it helped to see healthy recipes made from affordable supermarket vegetables. My Life took unexpected turns. I was invited to give a speech on food , interviewed for an Oxfam report on food banks and asked to write a cookery book. When I got the money from the book, for the first night in almost two years, I went to bed without worrying. Now, I have a well-paid job and a beautiful home, and I'll never forget the days when I worked hard for a good life. Question: The writer started to cook because _ . Answer:
OPTIONS:
- the food at the supermarket was unhealthy
- she had to feed themselves in a cheap way
- she was advised to do so by someone
- her son preferred home-cooked food
she had to feed themselves in a cheap way

Read the following article and answer the question. Article: "Blogging is helping students to think and write more critically ,"says an Australian researcher, "and can help draw out people who would otherwise not engage in debate." These are the preliminary findings of PHD research by Anne Bartlett-Bragg, a lecturer at the University of Technology, Sydney, who has been using weblogs or blogs in her own teaching since 2001. "The students are thinking more critically." she says, "They are learning to be responsible and they're communicating outside the boundaries of the classroom and the institution, and they like that. "Bartlett-Bragg says in conventional teaching, students often rely on the lecturer as the main source of ideas and critique for their work. "I'm a bit over listening to my students giving me back in an essay what I've told them in class." she says. "I want them to think for themselves and get different perspectives." "What makes blogs useful is their interactive nature." she says. These web-based forums for discussing ideas, experiences or opinions allow students to discuss publicly what they are studying with other students and experts outside their own university. "I really encourage them to put their personal opinion in there, provided they are informed and backed up with evidence." Bartlett-Bragg says because a lot of academics in her field of electronic or e-learning now have their own blogs, students can engage directly with them. She says one of the most powerful facilities in weblogs is pinging, which involves a person positing a comment about someone else's work on their own blog. They use the "Trackback" tool to notify the author when they have published the comment, basically inviting them to discuss it. "They get such a buzz when they make a comment on another person outside the boundaries of the institution and that person responds, or even gives them some further reading." she says. "They are getting new perspectives that I can't give them in a normal lecture." Question: What Bartlett-Bragg likes most is that blogs can help students to _ . Answer:
OPTIONS:
- think for themselves
- have stronger sense of responsibility
- know more about the world outside
- finish an essay assignment easily

Answer: think for themselves

Problem: OPTIONS:
- global warming
- bacteria's genetic diversity
- glacier melting
- biological diversity
Q: Read the following article and answer the question. Article: Imagine putting some bacteria in the freezer and taking them out millions of years later to find that they are still alive. That would be similar to what happened recently, when scientists brought eight-million-year-old bacteria back to life -- simply by thawing them out. The ancient bacteria were found frozen in the world's oldest known tracts of ice, the glaciers of Antarctica. Professor Bidle and his colleagues found and revived two samples of bacteria from the glacial ice. The first was a hundred thousand years old, and the second was around eight million years old. The eight-million-year-old bacteria were alive. But their genes were seriously damaged from long exposure to cosmic ( ) radiation, which is higher at the earth's poles. Most of the bacteria in the samples probably blew over from African deserts, said Paul Falkowski, a scientist at prefix = st1 /RutgersUniversity. Once the bacteria landed on the glacier's snowy surface, they combined with the snow to form ice. "These ices are actually gene banks," he added. As glaciers and ice caps melt as a result of increasing global warming, large amounts of bacterial genetic material might be washed into the ocean. These bacteria might get incorporated into today's bacteria in the ocean, or living bacteria from the ice might also grow and have an important effect on the ecosystem. "How that's going to play out, we don't know," Bidle said. He and Falkowski plan to focus their future work on how current ice melting influences modem bacteria's genetic diversity. Question: Professor Bidle and Paul Falkowski will probably do research into the influences of _ . Answer:
Answer:
glacier melting