请将下列句子单复数互换。1. This is a butterfly.
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2. Those are white sheep.
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3. This is her child.
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4. These apples are big.
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5. That is a gray mouse.
___________________________________________1. These are butterflies.
2. That is a white sheep.
3. These are her children.
4. This apple is big.
5. Those are gay mice.