Answer: B) Don't need.
Explanation for this question is being written.
Answer: D) Needn't / can.
Answer: A) Needs
Answer: C) Needn't
Answer: A) Need to.
Answer: C) Lack of necessity.
Answer: A) Don't need to.
Answer: A) Need
Answer: C) The IELTS test takers needn't return the pencils.
Answer: B) Needn't
Answer: A) Needn't
Answer: D) You can study later.
Answer: B) Needn't go.
Answer: B) Needs to.
Answer: C) Didn't need to.
Answer: B) Don't have to.
Answer: C) You don't have to attend the meeting if you're busy.
Answer: C) Both A and B.
Answer: A) Don't need.
Answer: C) Didn't have to.
Answer: B) Need to.
Answer: A) Didn't need to.
Answer: A) T
Answer: A) You needn't redecorate your room.
Answer: C) Need to.
Answer: D) Needn't
Answer: B) Need not.
Answer: A) Needed to.
Answer: C) Don't have to.
Answer: C) Need
Answer: C) Obligation
Answer: C) Needed
Answer: A) The interviewee needn't learn all the answers by heart.
Answer: C) We needn't bring an umbrella. The weather is beautiful.
Answer: B) You don't have to take a jacket.
Answer: B) I didn't need to get up early.
Answer: B) Are you sure we do not need to submit the form by today?
Answer: A) You needn't study all night for the exam.
Answer: B) Need
Answer: C) We need to use a telescope to see the surface of the Moon clearly.