我花了两个半星期看那本书 （用三种方法翻译成英语）

1、It took me two and a half weeks to read the book.
2、I spent two and a half weeks （in）reading the book.
3、I spent two and a half weeks on the book.
4、The book cost me two and a half weeks to read .
5、It cost me two and a half weeks to read the book.