重點講解：
36. eventually
解析：此處需要一個副詞，eventually“最終”，經常用于引出結果。
37. sustain
解析：此處需要一個原形及物動詞，sustain是四六級核心詞匯，此處表示“供給必需品及營養”。
38. trends
解析：根據謂語動詞的形式，此處的主語應該是名詞的復數形式，trends “趨勢”。
39. feeding
解析：此處用動名詞作介詞賓語，意為“喂養”。
40. crowded
解析：此處需要一個形容詞作定語，crowded“擁擠的”。
41. exhausted
解析：此處用過去分詞表被動，注意不要漏掉h。
42. atmosphere
解析：此詞雖長，但是較常見，且根據發音規則還是不難寫的，注意/f/音是由字母組合ph而來的。
43. tiny
解析：根據前面的only，可以推測此形容詞強調數量之少。不可錯寫成tidy。
44. 標準答案：Sagan proposes that algae, organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus
聽音關鍵：propose，algae，organisms，live，hot or cold，produce oxygen，be bred，similar，Venus
答案重構：Sagan proposes that algae, organisms living in extremely hot or cold atmospheres and producing oxygen, be bred in conditions similar to those on Venus
畫龍點睛：Segan，algae和Venus在上下文中都出現過，不應成為障礙性的詞。兩個逗號之間是algae的同位語。should型虛擬語氣的賓語從句中should可以省略。
45. 標準答案：Spaceships will then fly to Venus and fire the rockets into the atmosphere
聽音關鍵：Spaceships，fly to Venus，fire rockets
答案重構：Spaceships will then fly to Venus and launch rockets into the atmosphere
畫龍點睛：此句較簡單，基本上不必改寫。注意短句盡量不要漏掉任何一個單詞。
46. 標準答案：The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like Earth will be reproduced on Venus
聽音關鍵：surface，too hot to land，rain fall，sth. like Earth，reproduced on Venus
答案重構：Man can't land on it when its surface is still too hot but the rain will eventually fall and in a few yars Venus will turn to be like Earth
畫龍點睛：根據前一句可以將轉折之前的內容改寫成以man為主語的結構。