阅读短文，在横线上写出孩子们毛衣的颜色。

    Kate, Jim, Rose and Bill put their sweaters on the table. The sweaters are white，blue, red and black. We know the boys' sweaters aren't red and the girls' sweaters aren't black. What color is Kate's sweater? I don't know. But I know it is not blue.  Bill says, “My sweater is white”. Do you know what colors their sweaters are?

作文。
      牵挂是一杯清茶，飘荡着淡雅的清香，却苦得有味，苦得醇厚，别有一番韵味。
      请以“你是我的牵挂”为题，写一篇文章。
      要求：①除诗歌外文体不限； ②努力写出真情实感；③不少于600字。④文中不要出现真实的校名、人名。