本单元的写作任务是读一封建议信，了解建议信的结构和语言特征，然后再写一封建议信。 I .Pre-writing (I)Learning to write after the model 10 September，2018 Dear Worried Friend, You wrote that you are very worried about your friend,ChenLei.l understand quite well that you are anxious and feel terrible.Youthink that your friend plays computer games too often and spendstoo much time online.