It cost me twenty yuan to bay the book 的同义句 I ----- twenty yuan ----- the book那俩个横线的空怎样填?

I spent twenty yuan (in) buying the book/I spent twenty yuan on the book.

spent, on

It cost me twenty yuan to bay the book 的同义句
I --spent--- twenty yuan --on--- the book
希望我的答案对楼主有所帮助。。。
祝楼主学习进步。。。

I spent twenty yuan on the book.

spent,on
或
spent, buying