给下列句子选择恰当的答语。

⑴Is it in your bag？        

⑵Where is my car?         

⑶What's in the desk?      

⑷Have a good time.       

⑸Who's that boy?         

A.He's my brother.

B.Yes, it is.

C.Thanks, Mum.

D.My ruler.

E.It's under the chair.