题目内容：

大神教我到英语选择~When asked what they would volunteer to do,------said they were willing to
When asked what they would volunteer to do,------said they were willing to do something they could.
A.half of these B,hailf of which c,half of whom D half of them = =

优质解答

这里很明显是需要人称代词,所以首先A B排除 whom是做宾语的 但是这里需要的是主语
half of them 表示他们中一半的人 所以选D 哦