1、Section Using LanguageRecently,however,scientists have been finding thatlong-term use of these fertilizers can cause damage to the landand,even more dangerous,to peoples health.然而最近科学家发现，长期使用这些肥料可能伤害土地，甚至更危险的是伤害人类的健康。1cause damage to 对有损害典例 Smoking can cause damage to our health.吸烟会损害我们的健康。拓展 do dam
2、age to/do harm to 伤害；损害运用 完成句子Typhoons sometimes _(对 造成很大的损害)the crops.cause great damage toDrugs _(损害)his health.did harm/damage toThese chemicals in the food supply build up in peoplesbodies over time.食物中的这些化学物质会随着时间的推移在人体内堆积。2build up 逐渐增强；建立；开发典例 The teachers words built up my confidence.老师的话增强了
3、我的自信心。They built up this business after ten years struggle.经过十年的打拼后，他们建立了这家公司。拓展(1)build up 常指建造较大的物体。(2)put up 着重指建造、搭起一个具有高度的具体的物体。(3)set up 常和表示组织、机构、团体等意义的名词连用，与 found 的意义基本相同，但 found 更着重打基础。运用 完成句子All the pressure _(逐 渐 加 大),and hewas off work for weeks.They _(搭起)a tent near the fire.They have
4、_(建立)a school for the blind.built upput upset upMany of these chemicals can lead to cancer or otherillnesses.这里面很多化学物质会导致癌症或其他疾病。3lead to 导致；造成(后果)；通往，通向典例Too much work and too little rest often lead to illness.过量的工作和过少的休息经常会引起疾病。The car accident led to his being killed.那次车祸致使他死亡。拓展 lead sb.to do st
5、h.使某人做某事/领导某人做某事lead/live a.life 过着样的生活运用 完成句子They are _(过着艰难的生活)What _(使你这么想)?The cigarette end _(引起了这场火灾)led you to think soled to the fireleading/living a hard lifeThey focus on keeping their soil rich and free of di-sease.他们主要是想保持土壤肥沃且免受病害。4focus解析(1)n.焦点；中心点He took out the digital camera and ad
6、justed the focus.他取出数码相机并调整焦距。(2)vt.集中；聚焦He focused his mind on his lessons.他把心思集中在功课上。拓展 focus on 集中(注意力、精力等)于运用 完成句子 He was _(的焦点)everyonesattention.She tried to _(集中思想于)her work.the focus offocus on5keep.free from/of 使免受(影响、伤害等)；使不含(有害物)典例 We should keep this village free from/of pollution.我们要使这个
7、村庄免受污染的影响。拓展 keep sb.from doing sth.阻止某人做某事prevent/stop sb.(from)doing sth.阻止某人做某事运用 完成句子keep them free of/from dustWe put our books in the bookcase to _(避免落上灰尘)The heavy rain cant _(阻止我外出)keep/prevent/stop me from going outSwap summaries with your partner and give each othercomments.和你的搭档交换总结并互作评论。
8、6comment解析(1)n.评论；议论His words caused a lot of comments.他的话引起了许多议论。(2)vi.&vt.表达意见；作出评论He did not comment on what I said.他对我的话未作评论。拓展 make comments on/upon 评论comment on/upon 评论No comment.无可奉告。运用 完成句子He _(未作评论)our proposal.did not comment on/upon 或 made no comment on/upon本课时单词拓展单词构词法小结chemical adj.化 学的
9、；关于化学的chemistry n化学chemist n化学家 1._和_常为名词后缀。如：recovery 恢复；education 教育。2_ 常 为 名 词后缀，表示“人”。如worker 工人；leader 领导者。production n生产；制造produce v生产；制造producer n生产者product n产品discovery n发现；发觉discover vt.发现；发觉reduce vt.减少；减缩reduction n减少运用 用所给单词的适当形式填空1 The plane _ speed as it was approaching theairport.(reduction)2 This area ranks first in the whole country for cotton_.(produce)3 The _ of oil under the sea makes the smallcountry rich.(discover)4We will do a _ experiment this Friday.(chemical)reducedproductiondiscoverychemistry
