Answer: B) My mother said that I had to study hard.
Explanation for this question is being written.
Answer: B) No change.
Answer: A) He said he might go there.
Answer: D) Rita said that she might go there.
Answer: B) He said he had to leave early.
Answer: B) Would have been.
Answer: B) Couldn't
Answer: B) Had better refuse.
Answer: C) I'd like to know what time she can arrive at the station.
Answer: A) Could
Answer: B) Could help.
Answer: C) Will come.
Answer: B) Would
Answer: D) Couldn't go.
Answer: C) HAD TO ANSWER ALL THE QUESTIONS.
Answer: D) WOULD
Answer: D) Would
Answer: A) Arlene said that she had to quit eating junk food.
Answer: B) Might have left.
Answer: A) Er daughter can play the piano very well.
Answer: A) Would
Answer: A) Correct
Answer: B) She says that she would buy new house if she had been rich.
Answer: C) We would win.
Answer: E) Should visit.
Answer: B) Had to.
Answer: A) She could not come.
Answer: C) We should be.
Answer: B) He said that he had to finish his homework that day.
Answer: C) Would have.
Answer: B) They said that they could communicate smoothly.
Answer: C) Had to.
Answer: A) James said that they might arrive early that day.
Answer: B) I said you might leave then.
Answer: B) Might have.
Answer: C) They commented she had to work harder.
Answer: C) Not do.
Answer: A) Must not have been.
Answer: A) Not to take.
Answer: A) Could speak.
Answer: D) Couldn't
Answer: A) If I'd known it was a secret.
Answer: A) The doctor said David had to be on a diet.
Answer: A) He suggested I should rest now.
Answer: D) Should
Answer: C) He asked me if I could help him with this.
Answer: D) Majid said that it might rain the next day.
Answer: B) She had to get a dress for the party.
Answer: B) Change "will" to "would".
Answer: B) My grandma said that she could fall down the stairs.
Answer: A) He said that I should study harder.
Answer: C) She said she had to go then.
Answer: B) Betty didn't study enough so she didn't pass her tests.
Answer: C) She said that she had to leave then.
Answer: A) Correctly Written.