The sellers must pack the goods as（ ）in the contract.

The sellers must pack the goods as（ ）in the contract.
A、stipulated
B、stipulating
C、stipulate
D、stipulates
【正确答案】：A
【题目解析】：句意为卖家必须如合同中签订的那样将货物包装好。合同已签订因此使用过去式。