题目内容
根据示例写单词。
例: 
lion lions
1.
______________ ______________
2.
______________ ______________
3.
______________ ______________
4.
______________ ______________
5.
______________ ______________
lion lions1.
______________ ______________2.
______________ ______________3.
______________ ______________4.
______________ ______________5.
______________ ______________1. cow, cows 2. cat, cats 3. fish, fishes 4. horse, horses 5. tree, trees
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