题目内容
写出下列句子的单复数形式。
1. This is a towel.
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2. These are peas.
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3. These are onions.
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4. These are carrots.
___________________________________________________
1. These are towels.
2. This is a pea.
3. This is an onion.
4. This is a carrot.
2. This is a pea.
3. This is an onion.
4. This is a carrot.
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