записать предложение в Past Progressive
1) в антернативный вопрос
2) вопрос к подлежащиму
3)специальный и раздельный вопрос: В ПРЕДЛОЖЕНИЕ _ She was writing a lettle to her friend whtn he phoned

а как на вопросы ответить надо

так, как написано исходное предложение. При ответе на последний вопрос в начало ответа можно добавить yes

1. Was she writing a letter to her friend or to her grandmother when he phoned?2. Who was writing a letter to a friend when he phoned?3. What was she doing when he phoned?4. She was writing a letter to her friend when he phoned, wasn't she?