单选题 Dear Mr. William,
Thanks a lot for your inquiry ______ information on our helmets. We have the pleasure to enclose our latest catalogue and price list. On top of that, samples of various materials we regularly use in manufacturing are ______. Moreover, we are informing you that we would like to cooperate on product lines. We are also sending you another catalog containing various types of other products. If ______, please fax us item numbers so that we may send you samples to show our quality.
Thank you for your interest in our products.
Yours sincerely,
Monica, Manager of Sales