Tom:Hey,Helen.

Helen:Yes?

Tom:Is my computer game on the table?

Helen:No,it isn’t.It’s in the bookcase.

Tom:Oh,OK.How about my books? Are they in the bookcase,too?

Helen:No,they aren’t.They’re on the chair.

Tom:Oh.So,where’s my pencil box?

Helen:Hmm…it’s under the sofa.

Tom:And where’s my schoolbag?

Helen:It’s under the table.And your ruler is under the chair.

Tom:Oh,I see.And where are Mom’s keys?

Helen:The keys? They’re on the table.