A. They were watching a movie.
B. They watch a movie.
C. They will watch a movie.
D. They have watched a movie.
Answer: They were watching a movie.
A. They were watching a movie.
B. They watch a movie.
C. They will watch a movie.
D. They have watched a movie.
Answer: They were watching a movie.
Additional Information: The past continuous tense describes an action that was happening at a particular moment in the past.