How much is the book (which) you buy?How much do you pay for the book?How much does the book cost you?How much do you spend on the book?How much is the book (which) you buy worth?若满意,
I spent 20 yuan on this book.我花了20元给这本书 I paid 20 yuan for thisi book.我支付了20元给这本书 This book cost me 20 yuan.这本书花了我20元 It took me 20 yuan to buy this book.