What's this?
It's a red lamp.
"What's this?" or "What're these?"
What's this? It's a mat.
What's this?
It's a black table.
"What's this?" or "What're these?"
What's this? It's a pink sofa.
"What's this?" or "What're these?"
What're these? They're beds.
What's this?
It's a brown cupboard.
What're these?
They're orange chairs;
What're these?
It's a green armchair, a brown table and an orange mat.
"What's this?" or "What're these?"
What're these? They're lamps.
What're these?
They are an orange and a purple clocks.