答案解析：
36. valuable
解析：此處需要形容詞修飾practice，注意value需要去掉e再加able。
37. muscles
解析：此處需要與eyes，brain并列的名詞，注意不要漏掉c和詞尾的s。
38. information
解析：根據this，此處需要單數名詞，注意or。
39. complicated
解析：此處需要形容詞修飾chain，注意詞尾的ed。
40. especially
解析：此處需要副詞修飾useful，表示“特別”，注意開頭的e、中間的c，并且要雙寫l。
41. character
解析：此處需要名詞，注意ch和er。
42. virtues
解析：根據such...as，此處需要復數名詞，概括unselfishness，courage，意為“美德”。注意ir和ue。
43. discipline
解析：此處需要與unselfishness，courage和love并列的單數名詞。通過disc+ip+line記憶此詞會效果更佳、記得更牢。
44. 標準答案：but what is learned in books cannot have the same deep effect on a child's character as what is learned by experience
聽音關鍵：learned in books，not same，effect，character，learned by experience
答案重構：but what a child learns in books cannot have the same deep effect on his/her character as what he/she learns by experience
畫龍點睛：注意比較結構和否定意義。
45. 標準答案：that really prepares them to take their place in society as citizens when they grow up
聽音關鍵：prepare，take their place，as citizens
答案重構：that really prepares them for their place in society as grown-up citizens
畫龍點睛：注意prepare sb. to do sth.結構，可替換為prepare sb. for sth.。
46. 標準答案：he will later find it natural to work for the good of his country instead of only for his own benefit
聽音關鍵：natural，work for country，not own benefit
答案重構：later he will naturally work for the good of his country, not just for his own benefit
畫龍點睛：注意對比結構，其中強調的是前者。