请教一道改错题
题目
请教一道改错题
改错.This dog is more than a pet dog.It is used to a guide dog by Grandpa Lin and helps him walk safely.
答案
It is used to a guide dog by Grandpa Lin and helps him walk safely.
改成：It is used as a guide dog by Grandpa Lin and helps him walk safely.
as作为,而be used to 后面跟动词,这里是名词不对哦
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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