Answer: C) Peter could not have written that speech.
Explanation for this question is being written.
Answer: A) Negative deduction.
Answer: B) Could have.
Answer: C) Could take.
Answer: B) They could have gone to the party.
Answer: D) I couldn't have arrived.
Answer: A) Could have been.
Answer: D) Could have.
Answer: A) Couldn't
Answer: B) Has eaten.
Answer: C) Couldn't
Answer: B) I would have gone if I had known.
Answer: D) Would be.
Answer: D) Could
Answer: C) Can't have finished.
Answer: B) Were
Answer: C) Would
Answer: A) Could have lost.
Answer: C) Could not have.
Answer: E) Could
Answer: B) Could have had it.
Answer: E) Could help.
Answer: B) Couldn't have arrived.
Answer: A) Could
Answer: B) Couldn't have.
Answer: B) Could have eaten.
Answer: B) Have
Answer: B) Could have been.
Answer: C) Could
Answer: A) Would
Answer: A) Couldn't have.
Answer: A) Could have achieved.
Answer: B) Could have broken.
Answer: A) Couldn't have done.
Answer: B) Could have earned.
Answer: B) Couldn't have been.
Answer: A) Could have.
Answer: B) Could
Answer: B) She could have left early.
Answer: D) Had been.
Answer: C) Couldn't have seen.
Answer: C) Couldn't have.
Answer: D) Impossibility
Answer: C) Helen can't have broken those CDs.
Answer: A) Could have changed.
Answer: C) Could have gone.
Answer: C) Could have.
Answer: B) Couldn't
Answer: A) Could have climbed.
Answer: B) Could have met.
Answer: B) He couldn't have taken it.
Answer: A) HAVE FINISHED.
Answer: A) I'm sure you didn't enjoy it!
Answer: D) You could have studied harder for the exam.
Answer: D) Couldn't have finished.