What's this? It's a red pen., What's this? It's a rubber., What's this? It's a yellow pencil., What's this? It's my book., What's this? It's a notebook., What's this? It's a black bag., What's this? It's a desk., What's this? It's ruler., What's this? It's a pencil case.,

SM_1. Unit 1. Grammar: What's this?

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