Question

---What did the policeman say to you just now?

--- He asked _______ when the accident happened.

1. A.
   what I was doing
2. B.
   what was I doing
3. C.
   what I am doing
4. D.
   what am I doing

Answer 1

A
所选答案应为ask的宾语，宾语从句要用陈诉句语序，排除答案A和C；因为是问当事故发生时我在干什么，该用过去时，故选A。