Thank you for your letter dated August 30th.

感谢您8月30日的来信。

Thank you for your letter dated Sep. 18.

谢谢你9月18日的来信。

My dear Mr. Keats, thank you for your letter.

亲爱的济慈先生：感谢来信。

Thank you for your letter and suggestion (again).

谢谢你的来信和建议。

Dear friend, thank you for your letter to comfort me.

亲爱的朋友，谢谢你来信安慰我，我一切都很好。

Thank you for your letter of October 10for business copiers.

感谢贵方10月10日关于商用复印机的询函。

Thank you for your letter concerning our Autumn Collection.

谢谢你们关注我们秋季系列的来信。

Thank you for your letter of October 10 for business copiers.

感谢贵方10月10日关于商用复印机的询函.

We thank you for your letter asking for our new handbag catalogs.

感谢您来函索取本公司新型手提袋目录.

Thank you for your letter informing us that the goods was stolen.

感谢贵公司来信告知我们的产品遭窃.