38.at→with　39.detail→detailed　40.developing→?developed

　　　 综合提升　

40. Reaching the target is difficult for the parents in the least developing nations.

　　　 答案：31.去掉with　32.with→to　33.celebrate→congratulate　　 34.embarrassing→embarrassed　35.去掉of　ging→changed　37.to→with　

39. They take detail notes while listening attentively.　

38. She is strict at us all.　

37. Nobody has yet come up to an alternative method. 　

36. I’m afraid you won’t have enough time to get changing ?before? the party.　

35. The project became so expensive that we had to pull out of.　

34. I felt embarrassing when they were commenting on my dress.　

33. I will celebrate you on your passing the college entrance ?examinations?.