is my coat smart?的复数形式怎么写 用复数形式改写以下句子。

\u201cthis\u201d\u7684\u590d\u6570\u5f62\u5f0f\u600e\u4e48\u5199\uff1f

These are their cases.
These are their hats.
Are our coats smart?

Are my coats smart?

are my coats smart?

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