Answer: C) Must have done something naughty.
Explanation for this question is being written.
Answer: A) He must have forgot to feed the fishes.
Answer: A) Must have travelled.
Answer: A) Let me go.
Answer: A) Must have.
Answer: A) Can't have.
Answer: B) Must have accepted.
Answer: A) Was supposed to.
Answer: C) Must have left.
Answer: A) Must have attended.
Answer: A) Must have driven.
Answer: A) Must have been.
Answer: A) She must have listened to our conversation.
Answer: B) Must have gone out.
Answer: B) Can't have.
Answer: D) Must have had.
Answer: C) Must have.
Answer: A) No
Answer: B) Must have.
Answer: B) Must have changed.
Answer: C) Can't have seen.
Answer: B) It must have heard something.
Answer: A) Must have done.
Answer: A) Can't have gone.
Answer: C) Must have bought.
Answer: B) Have
Answer: A) Can't have seen.
Answer: A) Must have been stolen-was waiting.
Answer: B) Must have been.
Answer: A) Must
Answer: A) Must have lost.
Answer: B) Ability,intention and necessity.
Answer: B) They must have, but I don't know the details.
Answer: D) Must have been / was.
Answer: D) Have
Answer: A) Must have eaten.
Answer: D) Must have been.
Answer: B) Can't have been.
Answer: A) Must have settled.
Answer: A) Must have followed.
Answer: C) Must have been.
Answer: A) To guess what happened in the past, with varying levels of certainty.
Answer: A) Can't have done.
Answer: B) Must have gotten.
Answer: D) Must have held.
Answer: C) Modal Verb.
Answer: C) Have possible made.
Answer: D) Must have heard.
Answer: B) Must
Answer: A) Will/have done.
Answer: A) Must have gone.