Answer: D) Will/have changed.
Explanation for this question is being written.
Answer: C) Future perfect.
Answer: A) Will have exercised.
Answer: B) Will have finished.
Answer: C) Will have.
Answer: A) Have finished.
Answer: D) Future perfect tense.
Answer: A) Will have made.
Answer: C) They will have finished the breakfast by eight.
Answer: B) By the end of the summer.
Answer: C) Scientists will have measured mass with a balance.
Answer: A) Will have left.
Answer: B) Will have gone.
Answer: A) Won't have eaten.
Answer: B) False
Answer: A) Change 'will read' to 'will have read'.
Answer: D) Will have been.
Answer: B) Will have worked.
Answer: B) Will have written.
Answer: C) I will have finished the project by next week.
Answer: B) By the time I sell it next year.
Answer: C) The room will have been full.
Answer: C) Will have studied.
Answer: B) Won't have finished.
Answer: D) Will have.
Answer: D) Will have finished.
Answer: B) Will have lost.
Answer: C) Will have done.
Answer: A) Will have fixed.
Answer: A) Subject + will have + past participle.
Answer: D) Will have visited.
Answer: A) Will have done.
Answer: B) Will have achieved.
Answer: C) Future Perfect.
Answer: C) Will have lived.
Answer: C) Will have completed.
Answer: A) I will have finished my homework by tomorrow.
Answer: A) Will have finished.
Answer: A) Will have got.
Answer: A) Will have read.
Answer: C) He will have completed the marathon by the end of the race.
Answer: A) Will have had.
Answer: D) Will have studied.
Answer: B) I will have completed my project by next week.
Answer: A) Will you have eaten.
Answer: A) I will have finished reading this book.
Answer: B) By next month, I will have completed the project.
Answer: C) Will have made.
Answer: A) Will have missed.
Answer: B) Future Perfect.
Answer: B) Will have completed.
Answer: A) Will have started.
Answer: B) Will have lived.
Answer: B) Future perfect.
Answer: D) It depends on availability and plans.