改错：Ever since I graduated from middle school,I dreamed of travelling along Mekong River.
题目
改错：Ever since I graduated from middle school,I dreamed of travelling along Mekong River.
答案
Ever since I graduated from middle school,I have dreamed of travelling along Mekong River.
这是一个现在完成时态句型.从句since +过去式作时间状语,主句使用现在完成时.
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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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