This English question involves literary analysis, grammar, or writing skills. The detailed response below provides a well-structured answer with supporting evidence and clear explanations.
ScanSolve AI Answer
The sentence requires a verb in the past continuous tense to describe an ongoing action that was interrupted. The structure "What were you..." is followed by the present participle (verb + -ing). The most common verb to complete this question is "doing". What were you doing when I called you last night? The completed sentence is: What were you doing when I called you last night?