Răspuns:
b) they might have even not noticed the tyre was flat
c) I needn't have gone to all that trouble
d) someone appears to have borrowed the cassette player.
e) you might have also backed me up
f) we needn't have worried so much
g) the cat couldn't have possibly opened the fridge
h) helen could have given us a lift
i) the last person to leave might have left the door unlocked
j) we didn't have to wear school uniform at my school
Explicație: