49. We are informed that some wheat of Australian _____ has been sold here a t a level about 15% lower than yours. (A)source (B)resource (C)origin (D)birth place 。

6. Much as we would like to do business with you, _____. (A)we are unable to accept your order at the price you requested (B)we will be pleased to fulfill your order No. A116 (C)we are prepared to give a further reduction of 5% i n our quoted price (D)we expect to receive a new supply shortly 。