If Helen her credit card, she could have bought the dress.
A. brought
B. should bring
C. had brought
D. were to bring
网友回答
A. brought
B. should bring
(答案→)C. had brought
D. were to bring
解析：句意:如果海伦带着她的信用卡，她就能买那件衣服了。这里是虚拟语气，根据could have bought可以判断是对过去的虚拟，从句对过去的虚拟应该用had done，故选C。