Unit12 Life is full of the unexpected.

　　【重点短语】

　　1. take a shower 淋浴

　　2. leave my backpack at home 把背包忘在家里

　　3. get back to school 返回学校

　　4. start teaching 开始教学

　　5. go off 响铃

　　6. rush out the door 冲出房门

　　7. give sb a lift 捎某人一程

　　8. miss both events 错过两个事件

　　9. be about to do sth 正要做某事

　　10. stare in disbelief at 难以置信地盯着

　　11. raise above the burning building 从正在燃烧的楼上升起

　　12. jump out of bed 跳下床

　　13. collect the math homework 收数学作业

　　14. show up 赶到，出现

　　【重点句型】

　　1. By the time I got up, my brother had already gotten in the shower. 当我起床时，我哥哥已经进了浴室了。

　　2. By the time I got outside, the bus had already gone. 当我出来时，公汽已经走了。