试题题干
“However, whether such a sense of fairness evolved independently in monkeys and humans, or whether it stems from the common ancestor, is, as yet, an unanswered question.” 这句话的主语是（ ）
参考答案
正确答案：
试题解析
However, whether such a sense of fairness evolved independently in monkeys and humans, or whether it stems from the common ancestor, is, as yet, an unanswered question.
句意为：然而，这种公平感是在猴子和人类身上独立进化而来的，还是源于共同的祖先，至今仍是一个悬而未决的问题。
故本句的主语为whether such a sense of fairness evolved independently in monkeys and humans、whether it stems from the common ancestor.
所以本题选AB。