30. Your packing should be adequate and the shipping marks should _____ wit h those on your shipping documents. (A)collide (B)collaborate (C)correspond (D)cooperate 。

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 。