答案解析：
36. essential
解析：此处需要形容词，注意双写s和词尾tial。
37. amazing
解析：此处是现在分词用作形容词，不可遗漏-ing。注意不要写成形似近音词amusing。
38. enables
解析：此处需要动词作谓语，用法是接不定式作宾语补足语。注意that指代的是this magical time machine，故该谓语动词用第三人称单数。
39. Discovering
解析：此处需要动名词作主语，注意ing。由于此词位于句首，因此要大写首字母D。
40. preserves
解析：此处需要与makes并列的动词，注意开头的p不要漏掉。
41. pursuits
解析：根据one of和all可知此处需要名词复数形式，拼写时注意ur和ui。
42. apologize
解析：根据must可知此处需要动词原形。
43. compromised
解析：根据has been和by可知此处需要过去分词表示被动，所以不要漏写词尾d。
44. 标准答案：All the rest of us must accept the responsibility to make an effort to remember things
听音关键：the rest，responsibility，remember
答案重构：All the others must accept the responsibility to try to remember things
画龙点睛：此题可采用同义替换法简化。
45. 标准答案：Students and faculty should understand that a good education involves an emphasis on understanding rather than sheer memorization
听音关键：students，faculty，good education，emphasis，understanding
答案重构：Students and faculty should know that a good education emphasizes understanding more than sheer memorization
画龙点睛：关键是要抓住主谓宾和比较结构
46. 标准答案：If you want to retain what you learn, you must spread out the learning process
听音关键：to retain，must spread，learning process
答案重构：To remember/memorize what you learn, you must spread out the learning process
画龙点睛：根据上下文，此处的retain就是remember/memorize的意思，不会写可以替换。此处的条件状语从句也可改写为不定式结构。