基于高考外刊源文设计单元主题作业 ———B2 Unit2 Wildlife Protection 阅读下列短文，从每题所给A、B、C和D四个选项中，选出最佳答案。 A We may think that gift giving is a purely human trait, but it turns out many other animals also give presents to their mates and friends. Gift giving during mating has been observed in species as different as snails, earthworms and squid. Birds also enjoy this practice—male great grey shrikes, for example, stick small dead animals on thorns and twigs to attract females. However, the behavior is most common among insects and spiders. Nursery web spiders, for instance, offer possible mates prey wrapped in silk, adding special chemicals to make it more appealing. Some insects even make the final sacrifice for the females they wish to win over. The male redback spider does a backflip into the female’s mouth while mating, letting her bite the end of his body until he is finally eaten. All these are examples of mating gifts, given by males to females to persuade them to mate. Still, animals have also been known to give gifts just to make the receiver happy. For example, dolphins have been seen offering food to humans. There are also stories of crows bringing gifts to people who once helped them. Selfless gift giving is also common in bonobos, a type of ape that shares nearly 99% of its DNA with humans. So, this leads to a question—why do animals give each other gifts Since the behavior has developed independently in many species, it probably helps both males and females reproduce more successfully. But if that doesn’t sound very romantic, be encouraged by this: animals like crows and bonobos also seem to find joy in the simple act of giving. 1. What is the main idea of the passage A. Human gift-giving is the most advanced in the animal kingdom. B. Gift-giving is a behavior shared by humans and many other animals. C. Insects and spiders are the only animals that give gifts to their mates. D. Animals give gifts only for the purpose of reproduction. 2. According to the passage, why do male animals often give "mating gifts" to females A. To show their ability to find food. B. To persuade the females to mate with them. C. To build a long-term friendship. D. To protect themselves from being eaten. 3. Which of the following is an example of "selfless" gift-giving mentioned in the text A. A male shrike sticking prey on thorns. B. A nursery web spider wrapping prey in silk. C. A crow bringing a gift to a person who helped it. D. A male redback spider sacrificing itself during mating. 4. What can be inferred from the passage about gift-giving in animals A. It is a behavior that has evolved only once in the animal kingdom. B. It is solely driven by the desire for pleasure. C. It may serve different purposes in different situations. D. It is a sign of high intelligence only seen in apes and dolphins. B Around the world, expanding farmland is increasingly overlapping with elephant habitats, often leading to dangerous situations as e ... ...
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