how long you have kept this book for for 要不要加的啊 请说详细理由

how long you have kept this book for for 要不要加的啊 请说详细理由 how long the book can be kept (for) 要不要加for 什么情 how long have you kept this book?这句话对吗? how long have you kept the book?的同义句. how long have you kept this story book改为同义句 how long __this How long have you _______(have) this book? how long do you this book?For three days 应该填什么 how long have you studied english for? How long have you_____this book?--For about 2 we How long have you kept the book borrowed from the library How long have you brought this book?哪有错 改错题 ——how long have you bought this bike ——for two weeks