I bought a book ( ) my friend recommended.是否填 that 或 which 都可以?为什么?

I bought a book for i bought a book three days ago.改为一般疑问句. i,bought,book,father,for,my,a.连词成句啊! I bought a-------(cook) book in bookstore.就填cook This is a book.I bought it.改为宾语从句 I bought a book _ 10 yuan填介词啊 I bought him a book中的bought是什么系动词吗大神们帮帮忙 i bought this book ___ one yuan a copy.填ati bought this book ___ fifty cents.填for The book is a dictionary.I bought the book.改成定语从句 I bought him a book in a bookshop yesterday.改成强调句：It was him I bought a book in a bookshopyesterday.错的话错在哪里? 英语多项选择 I lost the book I_____.I lost the book I _____．　A．have bought 　　　B．bought C．had bought D．had been bought写原因 yesterday i bought a book.the book is really hard to understand(合并为一句)yesterday i bought a book______ _______ really hard to understand I bought a storybook and a book of cartoons 对a storybook and a book of cartoons 提问 I would like ____ a picture book.A.buying B.to buy C.bought who gave you a book同义词转换 i bought a pencil for you.同义词转换 I bought you this book?对this book提问 i bought him a book yesterday.中哪个是直接宾语,哪个是间接宾语? the store where i bought a book.还是that?怎么判断