We regret to report that a consignment of silk piece goods ____

We regret to report that a consignment of silk piece goods ____ Order No. 567 has not been delivered.
A、with 
B、for 
C、on 
D、under
【正确答案】：D
【题目解析】：under根据句意：我们遗憾地通知贵方，567号订单下的一批丝织品尚未发货。