12. The prices quoted above are provisional; _____ we may be compelled byrising costs of raw materials to increase our prices. (A)though (B)since (C)hence (D)before 。

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 。