41)We must apologize for the delay in replying to your letter of...

遲復貴方...月...日函,甚歉!

42) We thank you for your letter of ...and have much pleasure in replying to your various questions as follows: ...

感謝貴方...月...日的來信,很愉快答復各種問題如下: ...

43)In reply to your letter/inquiry of ... , we wish to inform you that...

茲復貴方...月...日函/詢盤,我們愿意告訴貴方...

44)Further to our letter of ...we wisth to informs you that...

續談我方...月...日函,欣告...

45)We refer to our letter of ...in which we asked you...

參閱我方...月...日的信件,我們要求貴方...

46) On...we wrote to you that...

...月...日我們函告貴方...

47)Since writing to you on...we have ascertained that...

...月...日寫信給貴方以來,我們已確定...

48)In your letter of... you expressed interest in our...

貴方在...月...日來函中表示對我方...有興趣。

49)Some time ago you told us that...

不久前,貴方告知我方...

50)Since receipt of your letter of ...we have been trying to find out more about...

收到貴方...月...日信函后,我們一直設法得到更多關于...

51)It is a long time since we have heard you about...

收到你方關于...的信件后已過了很長的時間。

52)In reply to our inquiry we have been told by...that...

茲復我方詢盤, ...已告我方...

53) We would point out that...

我方指出...

54) For your information we would add that...

我方要補充說明...供你參考。

55) As we informed you yesterday/by our letter dated...

正如我方昨日/...月...日信函所通知的...

56) According to information received from...

根據從...得到消息, ...

57) We need hardly say that...

我們幾乎不須說...

58) We hear on good authority that...

我們從可靠的官方消息得知...

59) As far as we know...

正如我方所知...

60) It appears that...

看來...