Odpowiedź :
1. How long( has Michael been studying) philosophy?
2.We.....(prefer) to a spend our free time at home.
3. My neighbour......(has just moved out) to Manchester.
4. Jack's talking to his boss. They...... (have been speaking) for one hour now.
5. I....(have never operated) a machine like this in my life.
6..... (Does Brain know) anything about tomorrow's demonstration?
7. There.... (haven't been ) any messages from the headquarters since last Thursday.
8. Your bike is all in mud. Where... (have you been riding), Tom?
9.I.... (do not want) anything to eat. I.....( have just taken) a big hamburger.
10.They....(haven't recorded) any song yet. They....(have been looking for) a manager for ten months now.
11. ....... (Does Sharon work) in the garden in her free time?
12. ...... (Have you ever tried) to learn to speak Japanese?
13. They.....(know) each other very well. They......(have been looking for) a manager for a long time.
14. Stop drilling for a while! You......(have been making) this horrible noise since I arrived.
15. You'll have a chance to meet Paula at the party tomorrow. That's great. I..... (have always dreamt) of meeting her.