Answer: A) NO CHANGE.
Explanation for this question is being written.
Answer: A) Who
Answer: B) Who
Answer: B) Which
Answer: B) That
Answer: B) Whom
Answer: A) Whom
Answer: D) Quae
Answer: A) He is the tour guide.
Answer: D) Who
Answer: A) WHO
Answer: C) Who, which, that, where.
Answer: A) Who's
Answer: A) Relative Pronouns.
Answer: C) Change who's to whose.
Answer: C) Which
Answer: C) Whose
Answer: A) Whose
Answer: A) Is the subject of the relative clause.
Answer: A) That
Answer: B) We ate the sweets which my mother had bought.
Answer: A) The word "whom" should be "who.".
Answer: C) Whom
Answer: C) Those
Answer: B) People
Answer: C) Who
Answer: D) Whose
Answer: B) Whose
Answer: B) Adam has two brothers, both of whom work as an engineer.
Answer: B) Whomever
Answer: B) Pronoun (relative).
Answer: B) Relative Pronoun.