Unit 12 Life is full of the unexpected. Unit 12 SectionAl(la-2d) 一、教学目标: 1.朿言知识目标: 1)能掌握以下单词及短语:unexpected, by the time, backpack, oversleep, ring, give ...a lift, 2)掌握By the time I got outside, the bus had already left. When I got to school, I ...