6 Complete the dialogue using the correct form of the verbs in brackets.
A: Hi, Sarah, I 0 ’ve been waiting (wait) for you since four o’clock. Where have you been?
B: I 1 ________________________ (shop) with my mum all day. We________________________ (not/have) time to get together since my birthday two weeks ago. We 3 ________________________ (both/be) really busy. I 4 ________________________ (study) for my exams and my mum 5 ________________________ (work) overtime. She’s saving to take us on holiday. We haven’t been away as a family for a long time.