单选题 It has become necessary to develop new and better tools of market research in order to _____ sales with greater certainty because production and purchasing must be adjusted to sales expectations.无
【正确答案】 D
【答案解析】句意： 有必要开发新的、 更好的市场调研手段， 以便更准确地预测销售情况， 因为生产和采购必须符合销售预期。 forecast预测。 foster培养。 calculate计算。 promote促进。