问题补充：
The teacher asked us .
A. when did I finished my work.
B. why didn’t we tell him about it earlier.
C. what we were interested in
D. where we are going to have our lunch
答案：
A. when did I finished my work.
B. why didn’t we tell him about it earlier.
(答案→)C. what we were interested in
D. where we are going to have our lunch
解析：考查宾语从句与时态。特殊疑问问作宾语从句语序要发生改变故排除A和C 。而D项时态前后不一致。故选C.
