Answer: B) Didn't need to buy.
Explanation for this question is being written.
Answer: C) Don't have to.
Answer: A) Needs to.
Answer: A) Don't have to.
Answer: D) Needn't
Answer: A) Need to.
Answer: E) Don't have to.
Answer: C) Need
Answer: B) Don't have to.
Answer: A) Needs
Answer: D) Need to.
Answer: A) Need
Answer: C) You don't have to bring your book.
Answer: A) You don't have to join the club if you don't want to.
Answer: C) Both
Answer: C) Dont have to.
Answer: D) Need
Answer: A) Won't need to.
Answer: D) HAVE TO.
Answer: D) Don't have to.
Answer: B) I didn't have to know it.
Answer: C) Needn't
Answer: B) Need to.
Answer: A) Didn't have to go.
Answer: B) Don't need.
Answer: B) Lack of necessity.
Answer: B) Do not need.
Answer: A) Doesn't have to.
Answer: A) You needn't call me unless there's an emergency.
Answer: C) Both wheels need be changed if the damage to the tire is not serious.
Answer: A) Don't need.
Answer: C) Didn't have to get up.
Answer: B) Need
Answer: C) Necessity
Answer: A) Needn't
Answer: C) Needs to.
Answer: C) Things that are not necessary to be done.
Answer: C) N't need to.