Надо составить предложения в Presend Perfect, используя различные временные выражения

They have just passed the exam ; They haven't passed the exam; Have they passed the exam?

She has just drew a picture; She hasn't drew a picture; Has she drew a picture?

Mum has just made a pie ; Mum hasn't made a pie; Has mum made a pie?

I have just saw the film; I haven't saw the film; Have I saw the film?

We have just bought a new flat; We haven't bought a new flat; Have we bought a new flat?