He bought a book yesterday ,the author______which is a teacher.(在定语从句中,用适当的介词填空）

He bought a book yesterday ,the author______which is a teacher.(在定语从句中,用适当的介词填空）
He bought a book yesterday ,the author______which is a teacher.(在定语从句中,用适当的介词填空）

He bought a book yesterday ,the author______which is a teacher.(在定语从句中,用适当的介词填空）
of,表示所属关系,整句话的意思是:我昨天买了一本书,那本书的作者是一位老师.