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

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