单项选择题A.The book with the signature.B.A novel published 6 years ago.C.A novel which costs 60 cents.D.A nineteenth-century book.
单项选择题A.There was no garbage left to clean up.B.There was more garbage than before and they had to work harder.C.The river had become so clean that a lot of water-birds came back.D.The river was much cleaner and they had to search for garbage.