21-25. Use the correct form of the word given to complete each sentence. 21. He has a _________great of foreign stamps.(collect) 22. She spent a _____________evening with her friends. (relax) 23. He has been a political _____________ for ten years . (comment) 24. King Quang Trung was one of our great_____________ (hero) 25. He is a great _____________ of Picasso's early paintings. (admire)