Unit 5Working the Land Using Language (Ⅱ)知识点讲练课件

选修一 Unit 5Using language (2)知识点讲练 重点词汇 1.pesticide n.　　　　 　　　　　 2.bacterium n. 　　　　　　　 3.grocery n. 　　　 　　　　 4.root n. 　　　　　　 　 5.mineral n. 　　　　　　　 6.organic adj.　　　　　　　   杀虫剂;除害药物　 细菌　 食品杂货店;[pl.]食品杂货　根;根茎;根部;根源　 矿物;矿物质　 有机的;不使用化肥的;有机物的　7.　　　　　 　adj.完全必要的;极其重要的 8.　　　　　 adj.分布广的;普遍的;广泛的 9.　　　　　 vt.& vi.消化　vt.领会;领悟　 n.摘要;文摘10.　　　　　 　n.可供选择的事物　adj.可供替代的;非传统的 11.　　　　　 n.例子;实例;事例 12.　　　　　 n.向下(或向里)的距离;深(度) 13.　　　　　 adv.全部地;完整地;完全地 14.　　　　　 n.方面;层面essential　widespread　digest　alternative　instance　depth　entirely　aspect重点短语1.separate...from　　　　 　　　　　 2.have no impact on 　　　　　　　 3.as...as possible 　　　　　　　 4.over time 　　　　　　　 5.as for 　　　　　　　 6.　　　　　　　　　集中于 7.　　　　　　　  防止……做……8.　　　　　　　  建立9.　　　　　　　  执行10.　　　　　　　  例如;比如 把……和……分开　 对……没有影响尽可能……　随着时间的推移　至于　focus onkeep...from...　set up　carry out　for instance1.This affects the crops grown on the land and,in turn,the animals and humans who digest them.这会影响土地里种植的作物,继而影响消化这些作物的人畜。【词汇精讲1】in turn相应地;转而;依次;轮流【词汇拓展1】by turns　轮流;交替地in one’s turn 轮到某人;接着take turns to do sth 轮流做某事it is one’s turn to do sth 轮到某人做某事。单句语法填空(1)Now that we have finished the design,it is their turn 　　　　　　　　(construct). (2)At the meeting they took turns 　　　　　　　(put) forward a number of suggestions. (3)The two daughters looked after their sick mother 　　　turns. to construct to putby【词汇精讲2】digest vt.& vi.消化　vt.领会;领悟【词汇拓展】digestion n.　　　消化;领悟digestive adj. 助消化的 用digest的适当形式填空(1)Nutrients from the 　　　　　food can be absorbed into the blood. (2) Large meals overload the 　　　　　system. digested　 digestive2They may look beautiful on the outside,but inside there is usually more water than essential minerals,and they often have less flavour as well.此类作物外表靓丽,而内里却经常是水分多于必需矿物质,并且往往口感较差。【词汇精讲】essential adj.完全必要的;极其重要的【词汇拓展】be essential to/for　　　　　　　 对……是必要的it is essential that...(should) do... 做……是必要的it is essential to do... 做……是必要的单句语法填空(1)As is known to all,nutrition and exercise are essential 　　　　　our health. (2)It is essential that every child 　　　 　　(have) the same educational opportunity. (3)It is essential 　　　　　(set) your goal before you do anything. to/for (should) haveto set3As an alternative,some farmers have switched to organic farming,and many customers have turned to organic food when they shop at the local grocery.作为一种替代方法,有些农民已经转向有机耕作,而且许多消费者在当地食杂店购物时,也转而选择有机食品。【词汇精讲】alternative n.可供选择的事物　adj.可供替代的;非传统的【词汇拓展】an alternative to... 　　……的替代物(to是介词)have no alternative but to do sth别无选择只好做某事have the alternative of doing sth　有做某事的选择单句语法填空(1)The Internet also provides us with a cheap alternative to 　　　　　　　　(communicate) with others. (2)That is 　　　　　alternative we think most Americans would rather not experience. (3) If you don’t like the school lunch,you will have the alternative of 　　　　　(bring) your own. communicating　 an　bringing4.For instance,they may grow corn or wheat in a field one year,and then grow beans there the next.例如,他们可能一年在田地里种植玉米或小麦,下一年再种植豆类。【词汇精讲】instance n.例子;实例;事例【词汇拓展】for instance 　　　　例如;比如in this instance 在这种情况下单句语法填空(1)　　　　　 this instance I think she was mistaken. (2)He’s a brave boy.　　　　　 instance,he saved a little girl by jumping into the cold river. In For1.In fact,some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment.事实上,由于对人类和环境有害,“滴滴涕”等农药在大多数国家已被禁用。【句式剖析】because of因为……,是介词短语,常用作原因状语,后面跟名词或代词作宾语。because是连词,其后接句子;because of是复合介词短语,其后接名词、代词、动词-ing形式、what 从句等,它在句中不用作表语。The teacher got angry because of what we had done in class.老师因为我们在课上做的事情生气了。一句多译约翰没有出席会议,因为他病了。(1)John didn’t attend the meeting 　　　　　　　　　　　　. (2)John didn’t attend the meeting 　　　　　　　　　　　　　. because of his illness because he was ill2.Therefore,there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible.因此,想要找到一个合适的解决方案,使人类和环境尽可能保持健康,又让人们有足够的食物可吃,这还有很长的路要走。【句式剖析】本句是一个复合句。there is still a long way...是主句,that puts...是定语从句,while keeping是省略的时间状语从句。as...as possible尽可能……。【句式拓展】as...as possible相当于as...as one can,使用时需要注意can的变化。You should read more and more books as carefully as you can!你要看越来越多的书,尽可能认真地看!重点词汇重点句式随堂练习【句式拓展】as...as possible相当于as...as one can,使用时需要注意can的变化。You should read more and more books as carefully as you can!你要看越来越多的书,尽可能认真地看!单句语法填空(1)When you are walking across the desert,take as much water 　　　　　possible. 一句多译用电子词典,你会很快查到你想要的。(2)You can get what you want in the electronic dictionary 　　　　　　　　　　　　. (3)You can get what you want in the electronic dictionary 　　　　　　　　　　　　　　　　. as　 as soon as possibleas soon as you can