高一英语必修3Unit4SectionⅡ资料.ppt

Ⅰ.词汇自测 1．Some computers can perform a ____________(十亿) computation a second. 2．As we all know，__________(理论) comes from practice，and in turn it must serve practice. 3．We know that matter is made up of ____________(原子)． 4．From space the earth looks like a huge watercovered ____________(球体)． billion theory atoms globe 5．The talk between the two countries went on in a friendly ____________(气氛)． 6．Eating junk food is ____________(有害的)to the young. 7．With so many problems arising，the ___________(制度) should be improved. 8．The boy likes studying the universe and he wants to choose ____________(天文学)as his major. 9．Police say armed robbery is the fastest-rising ____________(暴力的)crime. 10．As is well known，fresh air is ____________(基本的)to good health. atmosphere harmful system astronomy violent fundamental Ⅱ.选词填空 1．During the car accident，he was ________________ to escape from the car without being hurt. 2．No matter what will happen，nothing and nobody can ___________ the plan ________ being carried out. in time；be harmful to；in one’s turn；prevent...from...；be puzzled about；come into existence in time prevent from 3．This chemical ________________ the environment. 4．She lost heart since she failed in the exam.She ________________ her future.She had no idea what to do next. 5．Scientists have many theories about how the universe first ___________________. 6．After the second competitor went off the stage，my son went onto the stage to perform ________________. is harmful to was puzzled about came into existence in his turn 1. (教材P25)What it _______________ was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.　随后它会变成什么没人能知道，直到38～45亿年前，这团尘埃才形成一个固体的球状物。 was to become [句法分析] what引导主语从句，主干句是What it was to become was uncertain； when引导定语从句——when the dust settled into a solid globe。 此处“be＋不定式”结构表示将来注定会发生的事。 ①As a young man he didn’t know he was to win world fame later on. 年轻时，他不知道自己日后会举世闻名。 ②He was to regret that decision for the rest of