填空题
情景：
你叫李明，是一名学生。这天，你母亲突然生病住院，需要人照料，你的父亲出差在外，不能回来。
任务：
请你用英语给老师写一张50字左右的便条。告诉他：
·你请假的原因；
·请3天假；
·尽快返校，补上所缺课程。
请用下面格式：
Dear teacher,
Li Ming
【正确答案】
【答案解析】[范文]
Dear teacher，
I've to ask for a three-day leave．My mother is in hospital now and needs looking after．My father is away on business．He can't come back to look after her．I'll be back to class as soon as possible and make up for my missed lessons．
Li Ming