Question

I was listening to music when my mom __________ (to enter) my room. was entering enters In this case the first action was in progress when suddenly something interrupted it. For a longer action we use the Past Continuous Tense. The second action was shorter so we should use the Past Simple Tense.

Accepted Answer

entered has entered a

Question	I was listening to music when my mom __________ (to enter) my room.
A	entered
B	was entering
C	has entered
D	enters
Answer	a
Remark	In this case the first action was in progress when suddenly something interrupted it. For a longer action we use the Past Continuous Tense. The second action was shorter so we should use the Past Simple Tense.

Action Entered Past Tense I Listening Music Mom