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第二段:If I could go back and change one day in my life ,I would choose not to buy that melon.(这是与将来事实相反的虚拟语气)
The reason is that my parents and I were poisoned by the melon. The most important thing is that my mother has been pregnant with my brother .(根据你的文章知道妈妈怀孕是从你买西瓜到现在都在发生的事,故要使用现在完成时的)
2.On one day 要删掉介词On. at the fruit shop 改为in a fruit shop (在本文中第一次出现的事物)
3.最后一段第一句改为; what you can see .......is that the food safety problem is serious in our country now .
希望对你有帮助。
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