It was not _____ she took off her glasses _____ I realized she was a famous film star.　　

It was not ________ she took off her glasses ________ I realized she was a famous film star．（MET'92，31）

1. A.
   when；that
2. B.
   until；that
3. C.
   until；when
4. D.
   when；then

It was not _____ she took off her glasses _____ I realized she was a famous film star.　　

A. when , that 　     B. until , that         C. until , that           D. when , then