--What ____ you ____ when the phone rang?   

--I was washing my hair in the bathroom.

A. were, doing  B. was, doing   C. did, do    D. are, doing

--What ____ you ____ when the phone rang?  

--I was washing my hair in the bathroom.

1. A.
   were, doing
2. B.
   was, doing
3. C.
   did, do
4. D.
   are, doing

--What ____ you ____ when the phone rang?   
--I was washing my hair in the bathroom.