高一英语Scientistsatwork课件
日期：2010-06-11 06:01
Learning
Aims:
To get to learn something about the science in the world
To improve our listening ability
tie up 系紧；拴牢
be careful doing 小心做……
be to do 表示安排，命令，用途
１．We are to meet at the school gate （安排）
２．You are to be back by 10 o’clock（，
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