Answer: C) Have been built.
Explanation for this question is being written.
Answer: B) Have researched.
Answer: C) Have sold.
Answer: D) Have lived.
Answer: C) I have never seen such a beautiful sunset.
Answer: C) Has never been.
Answer: C) Has written.
Answer: A) Perfect Tenses.
Answer: D) Have spent.
Answer: A) Have seen.
Answer: C) Present perfect.
Answer: C) Have been.
Answer: B) Sub+have/has+p.p+com
Answer: A) Have / stayed.
Answer: B) She has played the piano for three years.
Answer: A) Have been.
Answer: B) Watched
Answer: A) Has lived.
Answer: A) Perfect tense.
Answer: A) Correct
Answer: A) Haven't informed.
Answer: C) Have lost.
Answer: A) The workers have planted trees.
Answer: B) Have lost.
Answer: A) Have / achieved.
Answer: D) Has attributed.
Answer: B) Has been.
Answer: B) Has built.
Answer: B) I've left it.
Answer: B) Tim has tried five different sports, but he hasn't liked any.
Answer: C) Because the auxiliary 'has' is already built into the perfect tense and should not be duplicated.
Answer: B) Present perfect.
Answer: D) Has planted.
Answer: B) Has lived.
Answer: A) Present Perfect Tense.
Answer: B) HAS LIVED.
Answer: C) Have studied.
Answer: B) Many times.
Answer: A) Correct as written.
Answer: D) I have seen that movie many times.
Answer: A) Seen
Answer: A) I haven't made any plans.
Answer: C) Might have forgotten muy number.
Answer: C) Have seen.
Answer: D) Has just finished.
Answer: A) Present Perfect.
Answer: C) Have lived.
Answer: B) I have cleaned my room.
Answer: A) Has arrived.
Answer: A) Have finished.
Answer: C) Present perfect tense.
Answer: B) I have washed the dishes.
Answer: B) Have lived.
Answer: C) Have finished.
Answer: B) Yes, I have.
Answer: D) Have done.
Answer: A) Present perfect.
Answer: C) Has