I was watching a TV program, when he . . . . . . . . in. A. was walking B. walked C. walks D. walk

was walking
walked
walks
walk

The correct answer is: B. walked

The sentence is in the past tense, so the verb “walk” must also be in the past tense. The other options are not in the past tense.

  • A. was walking is in the past progressive tense, which is used to describe an action that was happening at a specific time in the past.
  • C. walks is in the present tense, which is used to describe an action that happens regularly or repeatedly.
  • D. walk is the infinitive form of the verb, which is used to express a general idea or purpose.

In this case, the speaker is describing an action that happened at a specific time in the past, so the verb “walk” must be in the past tense. Therefore, the correct answer is B. walked.