The book that I put on the desk is now missing.这句对吗

The book that I put on the desk is now missing.这句对吗 The bag that I put on the chair is now missing. I put the book on the desk.句中的on the desk做什么成分, The coat (that) i put on the desk is blue,这里的that可否改成which whose book is that on the desk同义句 ________ ________the book Please put the book on the desk.(否定句) （1）Please____ put the The dictionary_________on the table is now missing.A that I There is a book that is on the desk The coat (that) I put on the desk is blue.这里的that可以省略吗?为什么? The coat that i put on the desk is blue.怎么看that是做宾语的? My book is on the desk.（同意句转换） There is a book on the desk.(改为否定句)