Răspuns:
1. didn't need to do
2. didn't need to call
3. needn't have bought
4. didn't need to dress
5. needn't have gone
6. didn't need to walk
Explicație:
Needn't have / didn't need to (expressing lack of necessity)
needn't - it was not necessary, but you did it anyway
didn't need to - it was not necessary, so you didn't do it
