1. Why has the lecture started?
2. Who has never been to Moscow?.
3. Which plane has just landed?
4. Why has he travelled in the wrong direction?
5. Who has just played tennis?
6. Whom have we just met?
7. Whose son has played the piano well?
8. What have they just translated?
9. What exercise have you just done?
10. What have we just written?
