Answer: A) Must have gone.
Explanation for this question is being written.
Answer: C) Must have been.
Answer: A) Must have.
Answer: B) She can't have been sleeping when you called her.
Answer: D) Must have.
Answer: A) She must have come home early.
Answer: A) Be
Answer: A) Must have done.
Answer: C) Must have lost.
Answer: A) Can't have been.
Answer: A) I wish I hadn't stayed up late last night.
Answer: A) Must have passed.
Answer: A) Can't have left.
Answer: B) Must have sat.
Answer: A) Must have taken.
Answer: A) MUST HAVE PASSED.
Answer: A) Must have played / could.
Answer: A) Must have flown.
Answer: D) Must have taken them.
Answer: A) Speculate, make guesses, deduce about past situations based on evidence.
Answer: A) Must have walked.
Answer: B) Must have been.
Answer: B) Must not have.
Answer: B) Must have dropped.
Answer: A) Can't have gone.
Answer: B) Must have cleaned.
Answer: C) They had to.
Answer: C) Must have.
Answer: A) Must have been.
Answer: D) Must have forgotten.
Answer: D) Must have cleaned.
Answer: A) Haven't you.
Answer: A) It must have cost a fortune.
Answer: B) Must have.
Answer: C) Must have been raining.
Answer: B) Must have studied.
Answer: A) I MUST HAVE LEFT THE KEY.
Answer: B) Must have started.
Answer: A) HE MUST HAVE HAD AN EMERGENCY.
Answer: A) MUST HAVE.
Answer: D) Must have studied a lot.
Answer: A) Can't be.
Answer: C) Using phrases like "I wondered if", "probably", and "must have been".
Answer: B) Must have seen.
Answer: C) Must have stolen it.
Answer: A) Must have stolen.
Answer: C) Won't have left.
Answer: A) Was supposed to be.
Answer: A) A had to have heard.
Answer: D) Must have left them in the taxi.