6.Today there are 6billion people on the earth.By the year 2050there may be 12.5billion.This means we need more food.
One way to produce more food is by growing stronger plants.For thousands of years,farmers have made plants better.Every season,they pick the best plants for the next season.It works very slowly.Since 1983,scientists have been able to change plants more quickly by changing their genetic material (遺傳物質(zhì)).Foods from plants grown in this way are called genetically modified foods (轉(zhuǎn)基因食品),or GM foods.
By changing the genetic material of a plant,it is possible to make new plants.They make plants which are strong against plant diseases.They can also help in our diseases:a kind of rice is being prepared (準(zhǔn)備),for example,which stops people from becoming blind.
Rich countries produce GM food because they are easy to grow and bring in more money.Poor countries are interested in them because they help produce more food.
GM plants are not natural.No one knows how good or bad they are.Making GM foods is only one way of feeding people in 2050.There are strong feelings against them,because they are unnatural.They may feed people,then hurt them or their children later.But,both rich and poor countries are very interested in their use,and they are not going to go away.In 2050we may think differently about them.
根據(jù)短文內(nèi)容,從A、B、C、D四個選項中選擇正確答案,并將其字母代號填入答題卷相應(yīng)空格內(nèi).
86.GM foods are made byC.
A.farmers B.workers C.scientists D.plants
87.What are the good things about GM foods?D
A.They make plants strong against diseases.
B.They are unnatural.
C.They can help in human diseases.
D.Both A and C.
88.GM foodsA.
A.a(chǎn)re a quick way to produce food
B.grow in the wild
C.a(chǎn)re safe
D.a(chǎn)re grown only in rich countries
89.Why do some people not like GM foods?C
A.They are not useful.B.They are not helpful.
C.They are not natural.D.They are not cheap.
90.From the reading we know that.B
A.GM foods will disappear one day in the future
B.GM foods will not disappear in the future
C.people will not be interested in GM food
D.people will have to stop using GM food.
分析 這篇短文主要講述轉(zhuǎn)基因問題.文章指出,轉(zhuǎn)基因可以使植物增強抗病能力,也可以對人類疾病有幫助.同時指出,轉(zhuǎn)基因植物非自然生長,其好壞尚不可知.
解答 86.C.細(xì)節(jié)理解題.根據(jù)Since 1983,scientists have been able to change plants more quickly by changing their genetic(遺傳的) material可知是由科學(xué)家制造出來的,選C.
87.D.細(xì)節(jié)理解題.此題講的是這些遺傳基因改變的食物的優(yōu)點.根據(jù)短文They make plants which are strong against plant diseases.They can also help in our diseases的描述可知,選項 A和C都是其中的一個方面,故選D.
88.A.細(xì)節(jié)理解題.根據(jù)短文because they help produce more food的描述可知,它們能夠幫助產(chǎn)生更多的食物,故是一種快速生產(chǎn)食物的途徑,故選A.
89.C.細(xì)節(jié)理解題.本題問的是人們不喜歡的原因,根據(jù)短文There are strong feelings against them,because they are unnatural的描述可知,人們強烈反對是因為它們不是自然的,故選C.
90.B.細(xì)節(jié)理解題.根據(jù)文章倒數(shù)第二句But both rich and poor countries are interested in their use,and they are not going to go away的描述,可知它們不會消失(go away),相當(dāng)于disapper,故選B.
點評 首先要通讀全文,掌握大意.然后細(xì)讀,瞻前顧后,逐步填空.利用捕捉的信息,注意細(xì)節(jié)和情節(jié)的發(fā)展變化,在選擇答案時,一定要考慮到上下文的意思,還要考慮到句子的結(jié)構(gòu),習(xí)慣用法,固定搭配和詞類的功能,盡量使選出的答案及復(fù)合語法又符合原文的意思.