题目

阅读理解 One key element of human language is the connection of words with meanings. Scientists had long thought that unlike our words, animal vocalizations(发出的声音) were involuntary, showing the feelings of the animal without communicating any other information. However, over the last forty years, many studies have shown that different animals have different calls with specific meanings. Interestingly, the most impressive are birds. Many bird species use different alarm calls for different predators(捕食性动物). Japanese tits, which nest in tree holes, have one call that causes their young to lower down to avoid being pulled out of the nest by crows, and another call for tree snakes that sends the young jumping out of the nest completely. And black-capped chickadees change the number of "dees" in their calls to indicate the size and threat of predators. Besides alarm calls, many bird species use recruitment calls that gather other members of their species. Japanese tits add alarm calls to recruitment calls to create a sort of call to arm, gathering their partner members to attack and drive off a predator. When the birds hear this call, they approach the caller while scanning for danger. Scientists led by Professor Toshitaka Suzuki of Kyoto University discovered that the order of the combined calls matters to the Japanese tits. When Suzuki's team played a recorded "alarm+recruitment" call to tits, it gets a much stronger response than a "recruitment+alarm" call. However, this could simply be explained by the birds responding to the combined calls without knowing the parts of the combination, but the scientists tried to clarify this question from different angles. （1） What do we know about animal vocalizations? A . They are produced unconsciously. B . They lack meaningful information. C . They are difficult for scientists to understand. D . They are connected with particular meanings. （2） How does the writer develop paragraph 2? A . By the order of time. B . By the order of space. C . By providing examples. D . By making comparisons. （3） What's the reaction of Japanese tits to a predator? A . They jump out of their nests immediately. B . They change the number of "dees" in their calls. C . They combine alarm calls with recruitment calls. D . They approach the predator while looking for danger. （4） What will the text talk about next? A . Other reasons for the birds' different responses. B . Various habits and characteristics of Japanese tits. C . Diverse combinations of animals' vocalizations. D . The importance of the "recruitment+alarm" call. 答案： D C C A

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