Question

We were strolling in the park when suddenly it _________ (to thunder). was thundering thundered The first action was in progress when suddenly the second one happened in the middle of the first action. For the action that was in progress we use the Past Continuous Tense, the action that occurred in the middle of the first one we should use the Past Simple Tense. 1

Accepted Answer

3 had thundered thunders past tenses

Task	We were strolling in the park when suddenly it _________ (to thunder).
Answer	3
a	was thundering
b	had thundered
c	thundered
d	thunders
comment	The first action was in progress when suddenly the second one happened in the middle of the first action. For the action that was in progress we use the Past Continuous Tense, the action that occurred in the middle of the first one we should use the Past Simple Tense.
topic	past tenses
level	1

Action Past Suddenly Thundered Progress Middle Strolling Park