【单选题】

Questions 144-146 refer to the following letter.

Gentlemen:
Thank you for your letter of March 12, (144) you expressed your willingness to open an account with us. From your letter we are glad to learn that you are particularly interested in shipping your products, and in these we may state that we are the specialists. We are able to do a (145) good business with you with all the experience we had with others.
But before we accept your proposal, it is usual with us to take up the reference nameD、We shall, therefore, (146) the pleasure of communicating with you further as soon as we hear from the bankers suggesteD、
Thank you for your courtesy in making the proposal and hope we may soon be able to work with you to our mutual advantage.
Yours very truly,
Adam Jones
A、has
B、having
C、had
D、have