单选题 Most outsourcing companies operate on ______shift schedules to adequately accommodate their clients' needs.
【正确答案】 C
【答案解析】解析:能放在名词短语shift schedules之前并对其进行修饰的应为形容词,故形容词(C)alternate(交替的)为正确答案。名词(A)、动词(B)、副词(D)都不能修饰名词。