_____ a book on the desk.

_____ a book on the desk. 改为同义句：A history book is on the desk.=_____ ______ a book ___ _____ book on the desk is____useful one 选项A.The;an B.A;a C.T i have a book on the desk clapped a book on the desk. is there a book on the desk? A book on the desk.改病句 那hardly是什么词性呀?_____ book on the desk is____useful one 选项A.Th Look!There _____(be) a book and two pencils on the desk.横线里是 A book is on the desk和On the desk is a book The book on the desk a book under the desk on the floor,on the floor修饰desk还是什么?