问题
单项选择题
His business prospered and he became a person of means. Yet, despite his great riches, he gave no arms to the needy and no thanks to his benefactors whose savings （） to his welfare.
A. had contributed
B. contributed
C. were contributed
D. did contribute
答案
参考答案：A
解析：
整个句子讲的是过去的事情，选过去完成式表示contribute这一动作发生在give之前。