Question

We _________ (walk) around the haunted house when suddenly we _______ (hear) a strange sound. 1)walked; heard 2)was walking; was hearing 3)were walking; were hearing 4)were walking; heard 5)walked; were hearing

Answer 1

We were walking  around the haunted house when suddenly we heard a strange sound.

Answer 2

The correct answer would be:

3. We were walking; were hearing.