how long do you this book?For three days 应该填什么

how long do you this book?For three days 应该填什么 -How long _____you _____the library book?-For three days. –Could you tell me how long __________ the book?--Three days 百度上的没有看懂~How long have you＿＿＿＿ For three days. — How long have you ________?— For three days.A.got a headac How long-this library-?应该填什么单词啊 How long ___you___(stay)?--I'm staying for three days. you must finish (read) this book in three days.read 用什么形式填写? you can keep a book for three days for how long do you do it? How do you do( 空格应该填什么?急用! How do you do 前面一句应该填什么?