Read the example sentence and answer the question. Then complete the rule. Aliya had just finished her homework when Madina phoned.
1 Which of the two actions came first: Aliya finishing her homework or Madina phoning?​

Aliya finishing her homework было первым. Поэтому с этим действием было использовано Past Perfect. Past perfect обозначает действие до Past simple. Past simple в данном предложении - Madina phoned