English Tense Tense Question #2971 (CAT-I)

Choose the correct past continuous combination:

A When I called on her she did her home work.
B When I called on her she was doing her home work.
C When I had called on her she was doing her home work.
D When I call on her she was doing her home work.
Correct Answer & Explanation
Option B
Option B is the correct answer according to official curriculum guidelines.