Answer: B) Needn't have bought.
Explanation for this question is being written.
Answer: A) We needn't have hurried.
Answer: A) Needn't have hurried / had already left.
Answer: B) Needn't have inflated.
Answer: C) Needn't have gone.
Answer: A) Needn't have worked.
Answer: C) Needn't have.
Answer: A) Needn't
Answer: B) Needn't have gone.
Answer: D) Needn't have hurried.
Answer: D) Needn't have bought.
Answer: C) Needn't have packed.
Answer: B) Needn't have come.
Answer: C) Both answers are correct.
Answer: B) Need not have bothered.
Answer: B) Needn't
Answer: C) Needn't
Answer: B) Needn't have finished.
Answer: C) I didn't have to answer all the sections.
Answer: A) Needn't have come.
Answer: B) Didn't need to pick.
Answer: A) Needn't have watered.
Answer: A) Needn't have.
Answer: B) Needn't have.
Answer: D) He beat the child.
Answer: D) Needn't have.
Answer: C) Needn't have bought.
Answer: D) You didn't need to do all this work.
Answer: D) You needn't have brought so much food.
Answer: A) Didn't need to.
Answer: A) Help
Answer: D) Needn't have worried.
Answer: B) Needn't have hurried.
Answer: A) Needn't have said.
Answer: C) Need not have worried.
Answer: B) NEEDN'T HAVE.
Answer: B) Needn't have told.
Answer: B) To say it wasn't necessary to do something in the past, but you did it.
Answer: C) Needn't have brought.
Answer: B) Needn't have studied.
Answer: B) You didn't need to have come early.
Answer: A) Needn't have brought.
Answer: A) Needn't have done.
Answer: C) Needn't have cooked.
Answer: B) Have cooked.
Answer: B) To indicate that something was unnecessary but was done anyway.
Answer: A) Needn't have carried.
Answer: D) Nancy needn't have cleaned all the flat.