问题
She asked ________.
A:what I was doing when she rang me up
B:what was I doing when she rang me up
C:when she rang me up what I was doing
D:when did she ring me up what I was doing
B:what was I doing when she rang me up
C:when she rang me up what I was doing
D:when did she ring me up what I was doing
正确答案是：
