This is why the number of 76 that an animal can make is very limited: the great tit (山雀) is a case 77 point; (举例好句型) it has about twenty different calls, 78 in human language the number of possible utterances is 79 . It also explains why animal cries are very 80 in meaning. (78题涉及到对比概念，而这篇文章中的主要概念对比，就是强调人与其它动物的对比，这一点大家好好体会。另外， 80题general 这个词的对比词是specific， 尽管文章中没有出现。人的语言可以表达具体特定的意思，而动物发出了声音只能表达笼统的意思。)

　　完形填空的每个空格都受到文章中已经知道的信息点的控制，句子中，前后句子中，或者整个语篇中的信息点的控制。同学们在复习完形的时候，要注意几点，指代，句型，搭配， 对比，词汇相关性。这些我在这篇文章中都举了一些例子说明。

　　本文选项：(黑体为答案)
　　61. A) classification B) definition C)function D)perception
　　62. A) that B) it C)as D)what
　　63. A)native B) human C) physical D) animal
　　64. A) ways B) means C) methods D) approaches
　　65. A) mating B) exciting C) warning D) boring
　　66. A) identical B) similar C) different D) unfamiliar
　　67. A) But B)Therefore C) Afterwards D) Furthermore
　　68. A) about B) with C) from D) in
　　69. A) infer B) explain C) interpret D) express
　　70.A) encourages B) enables C) enforces D) ensures

　　71. A) speeches B) sounds C) words D)voices
　　72.A) replacing B) spelling C) pronouncing D)saying
　　73. A)ours B) theirs C) another D) others
　　74. A)so B) and C) but D)or
　　75. A)this B)that C)which D)it
　　76. A)signs B)gestures C)signals D)marks
　　77. A)in B)at C) of D)for
　　78. A) whereas B) since C) anyhow D)somehow
　　79. A) boundless B) changeable C) limitless D) ceaseless
　　80. A) ordinary B) alike C) common D) general