1 Does the plane to Sydney leave at eleven o'clock? 2 Have you written two letters this morning ? 3 Are they going on holiday on Saturday? 4 Has Graham known Errol for five years? 5 Are you always leaving the door open? 6 Are we rehearsing a new play at the moment? 7 Has George bought a new car? 8 Has Lisa been cleaning the house all morning? 9 Has Alison dyed her hair?10 Are more and more people recycling their rubbish?