I spent 15 yuan on a book.(改为同义句） I____ 15 yuan____ the book

I spent 15 yuan on a book.(改为同义句） I____ 15 yuan____ the book I spent ten yuan buying the book 同义句 I （）ten yuan （）the book I spend five yuan on the book改为同义句 I spent ten yuan on this book.改为否定句 I spent ten yuan on the book.I ____ten yuan ____the book.改为同 I spent ten yuan buying the book 同义句 The boy spent 15 yuan on the book(改否定句） My friend spent 10 yuan on the book yesterday.(改写同义句） I have a book on the desk改为同义句 Thomas spent 10 yuan on this book.改为否定句 He spent ten yuan on this book.(改为同意句) l spent 12 yuan on the book怎么改同义句