climb trees爬树
Be quiet保持安静
Do not touch不要摸
No eating and drinking禁止吃喝
keep off the grass不践踏草坪
No parking禁止停车
No littering禁止扔杂物
from Japan来自日本
No smoking禁止吸烟
at once立刻，马上
his family他的家人
in a week在一周内
feel ill感觉病了
eight subjects八门课
eight lessons八节课
welcome back to school欢迎回到学校
what subjects什么科目
her students她的学生
the first lesson第一节课
wrong number打错电话
on Monday morning在星期一上午
