47. - Excuse me , but smoking isn’t allowed .

　　 - Oh , sorry , I didn’t know .

46. - I’m sorry to have kept you waiting .

　　 - It doesn’t matter .

45. I quite understand . Please don’t worry .

44. It’s nothing to worry about , I suppose . 我觉得这没有什么可担心的。

43. Please don’t give it another thought . 请再也别想这件事了。

42. Please don’t let it worry .

41. There’s no reason to apologize for such a thing . 没有理由为此事担心。

40. There is no need for you to worry in the least . 您完全不必担心。

39. Please don’t blame yourself . 请别自责。

38. It’s really of no importance . 这实在是微不足道的事。