1 a,b,c,g
2 b,d.f,g
3 b,d,e,f
4 a,b
5 b,d
6 b,d
1 Simon didn't order a pizza
2 the pupils weren't in the gym
3 she hasn't sent an invitation card
4 the children haven't cleaned their teeth
5 A thief didn't steal the handbag
6 Matthew didn't look after the baby
7 he hasn't missed the school bus
8 I didn't wake up at 8 o'clock
9 you haven't understood the text
10 we haven't worked in a snack bar