这句话有没有错误?帮我改正
题目
这句话有没有错误?帮我改正
He always had been engaged in database development in those companies,for which he worked since he graduated
答案
He had always been engaged in doing database development in those companies,for which he had worked since he graduated.
举一反三
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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