Задайте вопросы для подчеркнутых слов. she has been teaching children (all her life). pupils have been working on the text (for two lessons). he has been learning (french) since he came back from his trip. my mum (has been cooking) a festive dinner since the morning. my friend has been collecting (stamps) for ten years.

How long has has been teaching children?
How long have the pupils been working on the text?
What languge has he been learning since he came back from his trip?
What has my mum (been doing) since the morning?
What has m friend been collecting for ten years?