John usually spends 3 hours to do his homework every day.改错
题目
John usually spends 3 hours to do his homework every day.改错
答案
John usually spends 3 hours doing his homework every day.
spend...doing...花费...做...
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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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