She writes for a magazine.she wrote for a magazine when she left college用for或since连接 可改动
问题描述：
She writes for a magazine.she wrote for a magazine when she left college用for或since连接 可改动
答
She has been working/writing for a magazine since she left school
She has been working/writing for a magazine for two years
答
===She has been writing for a magazine since she left college.
===She has been writing for a magazine for four years,ever since her college graduation.