31.The supermarket sells various kinds of things, （從衣物食品到電腦游戲）
32.The new type of machine has been put in service, （讓我們年底完成工程成為可能）
33. It is true that humans have an extraordinary genius for working wonders, but （污染仍是當前及未來最嚴重的問題之一）
34. It is true that the world faces problems of pollution, but （這個問題可以通過全球的努力加以控制）
35.（在任何一個存在種族歧視的社會里）, there will always be tension.36.Some people say that in the next 30 years the population of Antarctica will grow steadily, （印度也同樣）
37. Someday, perhaps, （科學家能夠準確地預報地震）
38.（整夜他清醒地躺在床上）worrying about his financial problems.39.It is widely accepted that （社會的整個結構都依賴于相互信任）
40. By six thirty every morning, （操場上滿是晨練的學生）
32.The new type of machine has been put in service, （讓我們年底完成工程成為可能）
33. It is true that humans have an extraordinary genius for working wonders, but （污染仍是當前及未來最嚴重的問題之一）
34. It is true that the world faces problems of pollution, but （這個問題可以通過全球的努力加以控制）
35.（在任何一個存在種族歧視的社會里）, there will always be tension.36.Some people say that in the next 30 years the population of Antarctica will grow steadily, （印度也同樣）
37. Someday, perhaps, （科學家能夠準確地預報地震）
38.（整夜他清醒地躺在床上）worrying about his financial problems.39.It is widely accepted that （社會的整個結構都依賴于相互信任）
40. By six thirty every morning, （操場上滿是晨練的學生）