听力原文：
Passage One

The University of Tennessee's Walters Life Sciences building, is a model animal facility, spotlessly clean, careful in obtaining prior approval for experiments from an animal care committee. Of the 15,000 mice house there in a typical year, most give their lives for humanity. These are good mice and as such won the protection of the animal care committee. At any given time however some mice escape and run free. These mice are pests. They can disrupt experiments with the bacteria organisms they carry. They are bad mice and must be captured and destroyed. Usually, this is accomplished by means of sticky traps, a kind of fly paper on which they become increasingly stuck. But the real point of the cautionary tale, says animal behaviorist Herzau, is that the labels we put on things can affect our moral responses to them. Using stick traps or the more deadly snap traps would be deemed unacceptable for good mice. Yet the killing of bad mice requires no prior approval. Once the research animal hits the floor and becomes an escapee, says Herza, its moral standard is instantly diminished. In Herzau's own home, there was more ironic example when his young son's pet mouse Willy died recently, it was accorded a tearful ceremonial burial in garden. Yet even as they mourned Willy, says Herzau, he and his wife were setting snap traps to kill the pest mice in their kitchen with the bare change in labels from pet to pest, the kitchen mice obtained totally different moral standards.

Q26：What does the passage say about most of the mice used for experiments?

短文开始提到，大多数的实验鼠都为人类实验贡献了自己的生命。B项中的sacrifice their lives for对应原文中的give their lives for，故为答案。

听力原文：
Passage One

The University of Tennessee's Walters Life Sciences building, is a model animal facility, spotlessly clean, careful in obtaining prior approval for experiments from an animal care committee. Of the 15,000 mice house there in a typical year, most give their lives for humanity. These are good mice and as such won the protection of the animal care committee. At any given time however some mice escape and run free. These mice are pests. They can disrupt experiments with the bacteria organisms they carry. They are bad mice and must be captured and destroyed. Usually, this is accomplished by means of sticky traps, a kind of fly paper on which they become increasingly stuck. But the real point of the cautionary tale, says animal behaviorist Herzau, is that the labels we put on things can affect our moral responses to them. Using stick traps or the more deadly snap traps would be deemed unacceptable for good mice. Yet the killing of bad mice requires no prior approval. Once the research animal hits the floor and becomes an escapee, says Herza, its moral standard is instantly diminished. In Herzau's own home, there was more ironic example when his young son's pet mouse Willy died recently, it was accorded a tearful ceremonial burial in garden. Yet even as they mourned Willy, says Herzau, he and his wife were setting snap traps to kill the pest mice in their kitchen with the bare change in labels from pet to pest, the kitchen mice obtained totally different moral standards.

Q27：Why did the so-called bad mice have to be captured and destroyed?

短文提到，这些携带细菌生物的“坏”老鼠会破坏实验，所以必须捕获并杀死它们。故选D项。

听力原文：
Passage One

The University of Tennessee's Walters Life Sciences building, is a model animal facility, spotlessly clean, careful in obtaining prior approval for experiments from an animal care committee. Of the 15,000 mice house there in a typical year, most give their lives for humanity. These are good mice and as such won the protection of the animal care committee. At any given time however some mice escape and run free. These mice are pests. They can disrupt experiments with the bacteria organisms they carry. They are bad mice and must be captured and destroyed. Usually, this is accomplished by means of sticky traps, a kind of fly paper on which they become increasingly stuck. But the real point of the cautionary tale, says animal behaviorist Herzau, is that the labels we put on things can affect our moral responses to them. Using stick traps or the more deadly snap traps would be deemed unacceptable for good mice. Yet the killing of bad mice requires no prior approval. Once the research animal hits the floor and becomes an escapee, says Herza, its moral standard is instantly diminished. In Herzau's own home, there was more ironic example when his young son's pet mouse Willy died recently, it was accorded a tearful ceremonial burial in garden. Yet even as they mourned Willy, says Herzau, he and his wife were setting snap traps to kill the pest mice in their kitchen with the bare change in labels from pet to pest, the kitchen mice obtained totally different moral standards.

Q28：When are mice killed without prior approval?

短文提到，一旦实验鼠掉到地上并要逃跑，它的道德地位就会立即消失．杀死这样的老鼠不需要得到事先批准。故选C项。

听力原文：
Passage One

The University of Tennessee's Walters Life Sciences building, is a model animal facility, spotlessly clean, careful in obtaining prior approval for experiments from an animal care committee. Of the 15,000 mice house there in a typical year, most give their lives for humanity. These are good mice and as such won the protection of the animal care committee. At any given time however some mice escape and run free. These mice are pests. They can disrupt experiments with the bacteria organisms they carry. They are bad mice and must be captured and destroyed. Usually, this is accomplished by means of sticky traps, a kind of fly paper on which they become increasingly stuck. But the real point of the cautionary tale, says animal behaviorist Herzau, is that the labels we put on things can affect our moral responses to them. Using stick traps or the more deadly snap traps would be deemed unacceptable for good mice. Yet the killing of bad mice requires no prior approval. Once the research animal hits the floor and becomes an escapee, says Herza, its moral standard is instantly diminished. In Herzau's own home, there was more ironic example when his young son's pet mouse Willy died recently, it was accorded a tearful ceremonial burial in garden. Yet even as they mourned Willy, says Herzau, he and his wife were setting snap traps to kill the pest mice in their kitchen with the bare change in labels from pet to pest, the kitchen mice obtained totally different moral standards.

Q29：Why does the speaker say what the Herzau's did at home is ironical?

短文最后提到，在Herzog家里有一个更具讽刺意味的例子。当他们在悼念家里的宠物鼠时．Herzog却和妻子在用老鼠夹捕杀厨房里的“坏”老鼠。故选B项。