真题 B
《剑桥雅思7》第68页Test 3 Reading Passage 1 第3~6段
The begin
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They(ants) have never mastered fire nor progressed. Their fungus farming and aphid herding crafts are sophisticated when compared to the agricultural skills of humans five thousand years ago but have been totally overtaken by modern human agribusiness.
Or have they? The farming methods of ants are at least sustainable. They do not ruin environments or use enormous amounts of energy. Moreover, recent evidence suggests that the crop farming of ants may be more sophisticated and adaptable than was thought.
Ants were farmers fifty million years before humans were. Ants can’t digest the cellulose in leaves—but some fungi can. The ants therefore cultivate these fungi in their nests, bringing them leaves to feed on, and then use them as a source of food. Farmer ants secrete antibiotics to control other fungi that might act as “weeds”, and spread waste to fertilise the crop.
It was once thought that the fungus that ants cultivate was a single type that they had propagated, essentially unchanged from the distant past. Not so. Ulrich Mueller of Maryland and his colleagues genetically screened 862 different types of fungi taken from ants’ nests. These turned out to be highly diverse: it seems that ants are continually domesticating new species. Even more impressively, DNA analysis of the fungi suggests that the ants improve or modify the fungi by regularly swapping and sharing strains with neighbouring ant colonies.
... Questions 7–13
Complete the summary using the list of words, A–O, below.
Write the correct letter, A–O, in boxes 7–13 on your answer sheet.
Ants as farmers
Ants have sophisticated methods of farming, including herding livestock and growing crops, which are in many ways similar to those used in human agriculture. The ants cultivate a large number of different species of edible fungi which convert 7 ....................... into a form which they can digest. They use their own natural 8 ....................... as weed-killers and also use unwanted materials as 9 ........................ . Genetic analysis shows they constantly upgrade these fungi by developing new species and by 10 ........................ species with neighbouring ant colonies. In fact, the farming methods of ants could be said to be more advanced than human agribusiness, since they use 11 ........................ methods, they do not affect the 12 ........................ and do not waste 13 ........................ .
A aphids B agricultural C cellulose D exchanging
E energy F fertilizers G food H fungi
I growing J interbreeding K natural L other species
M secretions N sustainable O environment The end 【答案解析】
为确保学习效果,请先做题,再看解析。
题目 解题思路与答案
7 判断要填名词。定位fungi和digest。找到原文。
原文中:Ants can’t digest the cellulose in leaves—but some fungi can.该句中可填名词为cellulose和leaves。看选项单词列表,没有leaves,只有C选项cellulose,选出C。
8 定位weed-killers。找到原文。
原文中:Farmer ants secrete antibiotics to control other fungi that might act as “weeds”…注意control=kill;所以原文中antibiotics就是weed-killer。看选项单词列表,没有antibiotics。失望。再细看原文:secrete antibiotics(分泌出抗生素);选项中M选项secretions(分泌物)可以替换。所以答案为M。
9 定位并列结构and和unwanted material,找到原文出处:waste。
原文中:...spread waste to fertilise the crop. 用垃圾给农作物施肥。所以答案为F:fertilizers(化肥)。
10 定位neighbouring,new species和genetic analysis,找到原文:DNA analysis of the fungi suggests that the ants improve or modify the fungi by regularly swapping and sharing strains with neighbouring ant colonies.
注意到genetic=DNA;constantly=regularly;upgrade=improve or modify;species=strains;可以判断答案为原文swapping(交换)and sharing(分享)。注意到选项中从词性上判断只有D exchanging(交换)和J interbreeding(杂交)可填。从词义上判断该题答案为D。
11 定位蚂蚁和人类农业的对比。在原文顺序向下读找不到,只好向前寻找。找到第7题原文出处的上一自然段。其实再往上看一个自然段的末尾部分,在讲蚂蚁和人类农业的对比。
注意要填形容词,什么样的methods。原文:The farming methods of ants are at least sustainable. 注意at least是和人类农业方式相比较而言的。所以答案是N。
12/13 承接上题可迎刃而解了。注意题目中并列结构and,否定词do not,和waste一词在原文的同义表达。所以第12题答案是O,第13题答案是E。 原文选词填空完成句子
填空完成句子解题方法和从原文选词填空Summary一致。可理解为一句话Summary题型。 真题 A
《剑桥雅思7》第18页Test 1 Reading Passage 1 E段
The begin
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E The Sonar and Radar pioneers didn’t know it then, but all the world now knows that bats, or rather natural selection working on bats, had perfected the system tens of millions of years earlier, and their “radar” achieves feats of detection and navigation that would strike an engineer dumb with admiration. It is technically incorrect to talk about bat “radar”, since they do not use radio waves. It is sonar. But the underlying mathematical theories of radar and sonar are very similar, and much of our scientific understanding of the details of what bats are doing has come from applying radar theory to them. The American zoologist Donald Griffin, who was largely responsible for the discovery of sonar in bats, coined the term “echolocation” to cover both sonar and radar, whether used by animals or by human instruments. Questions 10–13
Complete the sentences below.
Choose NO MORE THAN TWO WORDS from the passage for each answer.
Write your answers in boxes 10–13 on your answer sheet. 10?Long before the invention of radar, ………… had resulted in a sophisticated radar-like system in bats.
11?Radar is an inaccurate term when referring to bats because ………… are not used in their navigation system.
12?Radar and sonar are based on similar …………. .
13?The word “echolocation” was first used by someone working as a ………… .
The end
【答案解析】
为确保学习效果,请先做题,再看解析。
题目 解题思路与答案
10 判断要填名词。定位连字符单词radar-like和时间long before,找到原文。
理解radar-like=原文中“radar”;long before=tens of millions of years earlier;sophisticated(精密复杂)一词则来自原文归纳:“人类工程师只有羡慕的份儿。”所以答案是natural selection。
11 判断要填名词。定位因果关系because,顺序往下找到原文。
理解inaccurate=原文中incorrect;referring to=talk about;because=since;答案是radio wave。
12 判断要填名词。定位并列结构and,顺序往下找到原文。
理解based on=underlying;答案是mathematical theories。
13 判断要填名词。定位引号单词“echolocation”和someone找人名,往下找到原文。
理解word=term;first used=coined;someone=Donald Griffin;答案是zoologist。注意不能填American zoologist,因为空格前是a不是an。 从原文选词回答问题
题目为What,Which,Why,Where,When等引导的疑问句,要求从原文中选词以作为该疑问句的答案。与其他填词题一样,该题型答案字数有限定。
解题时注意疑问词本身:问到who回原文找人名;where找地名;when找时间;how/why找due to, thanks to, based on, by等介词后的名词;问到what找名词。 注意:真题示例及答案解析请参考本书第6回第84页【真题示例C】和第9回第122页【真题示例A】。