1. Read the conversations. 朗读对话。

1. （1） A: Is this your⤻ruler?                          B: ⤼ Yes, it ⤼ is.
3. （2） A: Is that your⤻ schoolbag?                      B: ⤼No, it⤼ isn't.
5. （3） A: Are these her⤻ books?                           B: ⤼ Yes, they⤼ are.
7. （4） A: These are my⤼ keys. Are those your ⤻ keys?         B: ⤼No, they ⤼ aren't.
9. （5） A: This is his⤼ ruler. Are these his ⤻ pens?                 B: ⤼ Yes, they⤼ are.