It‘s on the desk.怎样改为一般疑问句?

It‘s on the desk.怎样改为一般疑问句? 将It's under the boy's desk改为一般疑问句 There are some flowers on the teacher's desk.(改为一般疑问句） The keys are on the desk（改为一般疑问句） The CDs are on the desk.改为一般疑问句 The computer is on the desk怎么改为一般疑问句 there is a lamp on the desk 改为一般疑问句 There are some candies on the desk(改为一般疑问句 There are some CDs on the desk 改为一般疑问句 there are some apples on the desk改为一般疑问句 Her books are on the desk(改为一般疑问句） His book is on the desk.(改为一般疑问句）