A:Where is my alarm clock?
B:Your alarm clock Is it on the table?
A:NO,it isn't
B:Is it on the sofa?
A:( Yes )thanks,Mom.
B:Take it to your bedroom,please.
A:OK,Mom.( Where are my keys?)
B:Your keys?They are in the desk.
A:Are they on my desk?
B:No,they aren't.They are your sister's math books.