I _______________ TV when the telephone rang.
-
watching
-
was watching
-
have watched
-
were watching
B
Correct answer
Explanation
For an action that was in progress when another action interrupted it, we use the past continuous tense (was watching). 'Watching' alone is incomplete. 'Have watched' is present perfect. 'Were watching' would require 'you' as the subject, not 'I'.