问题补充：
The doctor came up and asked me the day before.
A. what I had eaten
B. what had I eaten
C. that what I had eaten
D. that what had I eaten
答案：
(答案→)A. what I had eaten
B. what had I eaten
C. that what I had eaten
D. that what had I eaten
解析：句意：那位医生走过来问我前天我吃了什么。注意：宾语从句用陈述句语序，时态用过去完成时。
