问题描述：
单句改错Most of our friends are human beings,and we all make friends with animals and even things.
Most of our friends are human beings,and we all make friends with animals and even things
改错只能改一个单词(+上或-去或替换)
Most of our friends are human beings,and we all make friends with animals and even things
改错只能改一个单词(+上或-去或替换)
问题解答：
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