“Bina had just got home when I phoned. She ___ at her mother’s home.”

"In “Bina had just got home when I phoned. She had been at her mother’s home” “had been” (past perfect continuous) indicates a completed action before another past event. This tense clarifies the sequence of events essential for accurate storytelling or reporting in English. Understanding verb tenses like this enhances clarity in academic writing narratives or professional communication where precise timing of actions is critical for conveying context and maintaining coherence in complex sentences."