1) We have received your check for $ 2,000 enclosed with your letter of the 15th (of) June.
2) We are grateful for your letter of yesterday’s date in which you sent us your catalogue of office furniture.
3) We confirm by this letter our telephone conversation concerning the time of our delegation visit to Greece.
4) I wish to thank you most sincerely for your kind letter informing of the visit to your company.
5) I am most grateful to you for the invitation to the reception on the occasion of the official opening of the International Trade Fair.
6) It is a great pleasure to receive your letter inquiring about the details of a new model of computer. We have pleasure of sending you the latest catalog for your study.
2. d
3. b
Объяснение: