1. Before learning this unit, read the following paragraph and think.
Since early times, animals have lived closely with human beings. Most of us, especially animal rights activists, agree that both humans and animals deserve the same right to live and, therefore, they both should enjoy decent and favorable conditions. Should animals be treated in the same way as human beings? If so, should scientific experiments use animals to develop medicines to help and heal human beings? These topics have become very controversial issues. What's more, some people assume that animals can have a unique role as "man's best friends" similar to or even equal to the people we love and care. In this case, how should animals be treated? Should animals be abandoned or ignored when they are getting older? People may have different opinions about this controversy.
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2. Read the "animal talks" and answer the following questions.
Animal talk 1: Humans love me because I'm usually so cute, but I still cannot escape the fate of being a victim of animal research. I feel pinched and hurt. Why should they do this to me?
Animal talk 2: I am described as "man's best friend", of which I feel so proud. However, I was abandoned by my human owner. If no one adopts me, I will be "put to sleep". Who can justify my right to live? Who can speak out for me?
Animal talk 3: Ouch! Come on! How could you? Aren't you giving me injections to do medical experiments? Though I look like a human, I'm treated like trash. Why do you want to save a human life at the expense of mine?
Animal talk 4: Why should animals be used to do medical research? Shouldn't they enjoy equal rights as humans? Why can't scientists and physicians replace animal research with computer modeling to save animals' lives?
1). How do these talks emotionally affect you?
2). In what ways can you help to rescue their lives?
3. Before reading Text A, you may need the following information to help you with a better understanding.
animal research
Animal research is the use of animals in experiments, such as mice, rats, birds, fish, and frogs but also monkeys, primates, horses, etc. Most animals are killed in a painless way after being used in an experiment. Sources of laboratory animals vary between countries; most animals are purpose-bred, while others are caught in the wild or supplied by dealers. The research is usually conducted inside universities, medical schools, and the companies that produce drugs and medicine. Supporters of the use of animals in experiments argue that every medical achievement relied on the use of animals in some way and even sophisticated computers are unable to model interactions between cells, tissues, organs, organisms, and the environment, making animal research necessary in many areas. However, animal rights organizations question the legitimacy of the practice, arguing that it is cruel and poor scientific modeling because medical progress is being held back by misleading evidence collected from animals, and some of the tests are outdated and cannot reliably predict effects in humans. It is further argued that the costs outweigh the benefits and animals have the right not to be used for experimentation. Within the context of this controversial issue, Text A in this unit addresses the necessity of animal research.
4. Watch the video below.

