重庆市万州分水中学高中英语必修三《Unit 4 Astronomy the science of the stars 全员探究2.exist vi. ____________________Man can’t ______without air.(没有空气人就不能生存)火星上有生命吗？___________________________________________?拓展：存在 n.________________bring…into existence ____________________ come into existence=come into being ___________________(1). An information bureau was brought _______existence to deal with inquiries.(2) When did this world come _______existence?3.puzzle n/v.(1) n. ______________a cross word puzzle _____________I was in a _______about the matter.(我对这件事迷惑不解)(2) vt. _____________The question puzzled me.=I was _________by the question.归纳拓展：adj. ____________ 困惑的She listened with _____________________(困惑的表情)on her face.他不知道下一步怎么办。____________________________________________2. in one’s turn _______________Then in our turn, we got on the bus one by one._____________________________ 归纳拓展：It’s one’s turn to do something. ___________________________________It’s your turn to read, John.___________________________________in turn ____________________依次发言____________________Interest rate were cut, and in turn, share prices rose.__________________________take turns to do something ____________________We _____________(轮流)to drive on the way to Canada.3. prevent …from (doing) sth.什么也阻止不了我实现目标。_____________________________________________她因病不能参加考试。___________________________________________________4. in time (1).及时我们能及时到达车站吗？________________________________________________(2).迟早；总有一天；终于游泳不好学，但你迟早会学会的。________________________________________比较：on time ___________与 in time ________________________归纳拓展：in no time ___________at a time ____________at one time __________5. now that 既然，由于，充当连词，that 可以省略1既然你长大了，就不应该依靠你的父母。____________________________________Now that I’m free, I can enjoy music for a while.______________________________now that 和 since 相似，语气较弱，强调人们已知道的事实。2
