回答下列各题 Then mark the corresponding letter on AnswerSheet 2 with a single line through the centre. Language is the most astonishingbehavior. in the animal kingdom. It is the species-typical behavior. that setshumans completely 67 from all other animals. Language is a means ofcommunication, 68 it is much more than that. Many animals can 69.The dance of the honeybee communicates the location of flowers 70 othermembers of the hive (蜂群). But human languagepermits communication about anything, 71 things like unicorns (独角兽) that have never existed. The key 72 in the fact that theunits of meaning, words, can be 73 together in different ways, accordingto 74 , to communicate different meanings. Language is the most important learning we do. Nothing 75 humans so much as our ability to communicate abstract thoughts, 76 about the universe, the mind, love, dreams,or ordering a drink. It is an immensely complex 77 that we take for granted. Indeed, we are notaware of most 78 of our speech and understanding. Consider whathappens when one person is speaking to 79 The speaker has to translate thoughts into 80 language. Brain imaging studies suggest thatthe time from thoughts to the 81 ofspeech is extremely fast, only 0.04 seconds! The listener must hear the soundsto 82 out what the speaker means. He must use thesounds of speech to 83 the words spoken, understand the pattern of 84 of the words (sentences), and finally 85 the meaning. This takes somewhat longer, aminimum of about 0.5 seconds. But 86 started, it is of course a continuous process. A．apart

A. off
B. up
C. down