They often helped each other when they were at school.把这句话改成否定句和疑问句.
题目
They often helped each other when they were at school.把这句话改成否定句和疑问句.
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答案
They didn't often help each other when they were at school.
Did they help each other when they were at school?
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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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