国家开放大学 / 综合英语（3）
正确率：100%
_ _ _ _ _ is what she wants to know.
A.Who to do it
B.Whom to do it
C.Who does it do
D.Whom doing it
A.Who to do it
B.Whom to do it
C.Who does it do
D.Whom doing it
参考答案：
佳题速递：