(5)貴公司某月某日函電，敬悉……

l. We have pleasure in acknowledging receipt of your esteemed favour of the 3rd May

2. We are pleased to acknowledge receipt of your favour of the lst June

3. We have to acknowhedge receipt of your favour of the 5th July

4. Your letter of May 5 was very welcome

5. Your letter of April l0 gave me much pleasure

6. Your esteemed favour of 7th May was duly received by us

7. Your favour of the 5th June is duly to hand

8. Your favour of the l0th is to (at) hand

9. We are in due receipt of your favour dated the 7th June

10. We are in receipt of your letter of the 7th July

11. We are in possession of your letter of the 5th April

12. We have duly received your favour of the 5th March

13. Your letter of yesterday's date is duly to (at) hand

14. Your esteemed communication of yesterday's date is just to (at) hand

15. We thank you for your favour of the 5th May

16. We are obliged for your letter of the 5th May

17. Many thanks for your latter of the 5th June

18. Very many thanks for your letter of May 5

19. In acknowledging receipt of your letter of the 5th June， ……

20. Your favour of the 5th May has just reached me

21. Your favour of the 5th May is duly received

22. Your favour of the 5th May is now before me

23. Your promised letter under date (of) the 5th June has just reached us