Answer: A) It can't have been Mrs. Mai you saw because she is in Boston.
Explanation for this question is being written.
Answer: A) Must have lost.
Answer: D) She must have done lots of work.
Answer: A) Must have happened.
Answer: A) Must have known.
Answer: A) Must have been trying.
Answer: B) Must have.
Answer: D) Must have given.
Answer: A) To express a past possibility or certainty.
Answer: B) Past Perfect.
Answer: D) Must
Answer: B) Must have worked.
Answer: C) Must have.
Answer: B) To take.
Answer: A) They must have been sick.
Answer: E) Must have worn.
Answer: B) Must have left.
Answer: A) They must have been working on this project all night.
Answer: A) Must have told.
Answer: B) Can't
Answer: C) Must have felt.
Answer: B) Can't have been.
Answer: A) Must have remembered.
Answer: A) Must have gone.
Answer: A) Can't, must have been.
Answer: A) Must have taken.
Answer: C) Must have taken.
Answer: A) Must have.
Answer: D) Must have been exhausted.
Answer: A) Must
Answer: A) Can't have left.
Answer: D) Can't have been my phone.
Answer: A) Must have left.
Answer: C) Can't have.
Answer: C) Must have studied.
Answer: A) Couldn't have stolen.
Answer: A) Couldn't have been.
Answer: B) Must have moved out.
Answer: B) Almost certain.
Answer: A) Must have caught.
Answer: C) Must have rained.
Answer: C) Must have been.
Answer: A) Cannot have closed.
Answer: A) Must have been.
Answer: D) Had done.
Answer: C) Must have forgotten.
Answer: B) Can't have.
Answer: D) Must have.
Answer: B) Come
Answer: B) He must have left already.
Answer: A) Hadn't worn.
Answer: B) B have been.
Answer: A) Couldn't have.
Answer: B) Mustn't have.
Answer: A) She must have forgotten the appointment.
Answer: A) Must have studied.