答案：D

题目分析：考查形容词辨析。句意：怀特女士是一个这里定期的顾客，直到隔壁超市两三周之前开业。typical典型的,有代表性的，如：This painting is typical of his early work这幅画是他早期的代表作。normal正常的,正规的,标准的，如： The doctor said the child's temperature was normal医生说孩子体温正常。regular定期的,定时的 如：He made a regular visit to his parents. 他定期看望父母亲。common指为许多人或事物所共同具备因而常见，如：This custom is very common in that area.这种风俗在那个地方很普遍。故D正确。