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。
资料2
资料3
请根据以上资料，选择以下栏目的正确选项：