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  • Read the following passage and answer the questions that follow

    In spring 2008, the polar bear was placed on the endangered species list. According to the Endangered Species Act, an endangered species is an animal that is likely to face extinction in its natural habitat. Polar bears have been categorized as a "threatened" species. The ESA defines a threatened species as one that is likely to become "endangered" in the foreseeable future.

    The polar bear is the first animal that has been classified as endangered due primarily to global warming. Global warming is caused by carbon dioxide and other greenhouse gases that become trapped in the atmosphere. Heating homes, driving cars, and burning garbage all require fossil fuels that lead to global warming.

    The polar bear's habitat is more vulnerable to global warming than many other species. Polar bears live mainly on the sea ice in the Arctic. This is where they hunt for fish and build up fat reserves. When the ice melts many polar bears move to land and live off their stored fat. In the Arctic, global warming is causing the ice to melt slightly earlier and form slightly later. This results in a shorter feeding season for the polar bear. Some risk their lives to find ice. If they have to swim too far they will drown from exhaustion and hunger. The World Wildlife Fund estimates that 25% of the Arctic sea ice has disappeared in the past 30 years.

    Câu hỏi:

    According to the text, the polar bear ________.

    • A. 
      has already become extinct
    • B. 
      is likely to be categorized as "threatened species"
    • C. 
      may become endangered in the near future
    • D. 
      was placed on the ESA list

    Lời giải tham khảo:

    Đáp án đúng: C

    Dẫn chứng đoạn 1: In spring 2008, the polar bear was placed on the endangered species list. According to the Endangered Species Act, an endangered species is an animal that is likely to face extinction in its natural habitat. Polar bears have been categorized as a "threatened" species. The ESA defines a threatened species as one that is likely to become "endangered" in the foreseeable future.

    Đáp án đúng: C. may become endangered in the near future

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