题目内容：

policeman asked the man ——near the school on such a dark night
A.what was he doing B.what he is doing C.what is he doing D.what he was doing

优质解答

D.what he was doing
B,C 和题干主句中的asked 时态不一致,由于是宾语从句,不可以用倒装语序,故排除A