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; (舉例好句型) 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題涉及到對比概念，而這篇文章中的主要概念對比，就是強調(diào)人與其它動物的對比，這一點大家好好體會。另外， 80題general 這個詞的對比詞是specific， 盡管文章中沒有出現(xiàn)。人的語言可以表達(dá)具體特定的意思，而動物發(fā)出了聲音只能表達(dá)籠統(tǒng)的意思。)
完形填空的每個空格都受到文章中已經(jīng)知道的信息點的控制，句子中，前后句子中，或者整個語篇中的信息點的控制。同學(xué)們在復(fù)習(xí)完形的時候，要注意幾點，指代，句型，搭配， 對比，詞匯相關(guān)性。這些我在這篇文章中都舉了一些例子說明。
本文選項：(黑體為答案)
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
