Answer: A) No doubt.
Explanation for this question is being written.
Answer: C) Probably
Answer: A) Never
Answer: B) Change SURE to SURELY.
Answer: C) Definitely
Answer: C) Maybe
Answer: B) Probably
Answer: C) It is certainly true.
Answer: A) Likely
Answer: B) Definitely
Answer: A) Undoubtedly, she will win the race.
Answer: B) Surely
Answer: A) Absolutely
Answer: A) Definitely
Answer: C) Will
Answer: D) Always
Answer: D) Yet
Answer: D) Surely, I can do this work.
Answer: B) Hardly
Answer: A) Perhaps it will rain tomorrow.
Answer: A) Completely
Answer: A) Ever
Answer: B) They add certainty or possibility to meaning.
Answer: D) Probably
Answer: A) She might possibly arrive late.
Answer: B) They will do that again.
Answer: A) Really
Answer: B) Never
Answer: B) False
Answer: C) Unlikely
Answer: A) Yes
Answer: A) Probably
Answer: A) Correct
Answer: B) Ever
Answer: D) Never
Answer: B) Certain
Answer: C) It was clear to everyone that she would win the competition.
Answer: C) Yet
Answer: C) More or less.
Answer: B) Adverb
Answer: C) Yet / already.
Answer: B) Explicitly
Answer: B) Unlikely
Answer: C) All right.
Answer: C) Never
Answer: D) Undoubtedly
Answer: B) Not
Answer: C) Obviously
Answer: C) Certainly