what's under the desk?和what's it under the desk?区别

what's under the desk?和what's it under the desk?区别 what's that under the desk? What is under the desk? under it,s desk the练成一句话. What's under the desk?回答：(A.)It'sXXX (B.)There'sXXX What's that under the desk?Let's go and （　）a look.Oh,( ) a w _________ his book?It's under the desk. what's on the desk? What"s under the sofa? What's there on the desk?与 What's on the desk?区别? What's this on the desk?与What's on the desk的区别. Look!It’s under your desk.