40. Had they studied hard, they _________________ .(.现在做它就会容易了) ( do )

39. When Edison died, it was suggested that the American people _________________________ (关掉所有电源) in their homes, streets and factories for several minutes in honor of this great man.　 (turn)

38. ____________________________________ (把一种癌症看作一个礼物) requires extreme courage.　 (think)

37. ____________________________ (比起他曾经拥有的), the stamps were not interesting at all. ( compare)

36. ____________________________________ (违法的人) should be punished.　　 (break)

35. How I wish I _______________________ (没有动过) about that recorder! I just made it worse.　 (do)

34. Completely ________________________ (投身于控制致命疾病), he hardly thinks about getting married.　 (devote)

33. Science and technology is developing so rapidly that I can’t imagine ____________________ (我们的电脑系统会是什么样子) in the future.　 (what)

32. The earliest Irish art is found carved on monuments, _______________________ (追溯到) 2,500-2,000 BC.　 (date)