5 Complete the sentences with the present perfect of the verbs in brackets and for or since where necessary.
1 ... (have) this mobile phone ... a few weeks.
2 You ... (be) at the market ... eight o'clock.
3 We ... (be) vegetarian ... two years.
4 How long ... (your mum/work) in a hospital?
5 They ... (not see) Ewa ... Christmas.
6 How long ... (you/know) him?​