2. Transform the sentences and use either Present Perfect Simple or Present Perfect Continuous.
1. She has walked 10 km. –____________________________(for 3 hours).
2. I have been talking to Ann on the phone since 2 o’clock. –__________ (just).
3. Nick has learned this poem by heart! – _________________ (all morning)!
4. Mummy has been cooking for 2 hours. – ____________________ (yet)

1. She has walked 10 km. – She has been walking for 3 hours.  

2. I have been talking to Ann on the phone since 2 o’clock. – I have just talked to Ann on the phone.  

3. Nick has learned this poem by heart! – Nick has been learning this poem by heart all morning!  

4. Mummy has been cooking for 2 hours. – She hasn't finished cooking yet. (yet в основном употребляется в отрицательных и вопросительных предложениях)