六级经典阅读3Passage 1Not content with its doubtful claim to produce cheap food for our own population ，the factory farming industry also argues that “hungry nations are benefiting from advances made the poultry（家禽）industry”。 In fact， rather than helping the fight against malnutrition（营养不良）in “hungry nations”， the spread of factory farming has， inevitably aggravated the problem. Large-scale intensive meat and poultry production is a waste of food resources. This is because more protein has to be fed to animals in the form of vegetable matter than can ever be recovered in the form of meat. Much of the food value is lost in the animals process of digestion and cell replacement. Neither， in the case of chicken， can one eat feathers， blood ， feet or head. In a，only about 44% of the live animal fits to be eaten as meat.This means one has to feed approximately 9-times as much food value to the animal than one can consume from the carcass. As a system for feeding the hungry， the effects can prove disastrous .At times of crisis， grain is the food of life.Nevertheless， the huge increase in poultry production throughout Asia and Africa continues. Normally British or US firms are involved. For instance， an American based multinational company has this year announced its involvement in projects in several African countries. Britain s largest suppliers chickens， Ross Breeders， are also involved in projects all over the world. Because such trade is good for exports， Western governments encourage it. In 79， a firm in Bangladesh called Phoenix Poultry received a grant to set up a unit of 6，000 chickens and ，000 laying hens. This almost doubled the number of poultry kept in the country all at once. But Bangladesh lacks capital， energy and food and has large numbers of unemployed. Such chicken-raising demands capital for building and machinery ，extensive use of energy resources for automation， and involves feeding chickens with potential famine-relief protein food. At present， one of Bangladeshs main imports is food grains， because the country is unable to grow enough food to feed its population. On what then can they possibly feed the chicken？26. In this passage the author argues that_.A）efficiency must be raised in the poultry industryB）raising poultry can provide more protein than growing grainC）factory farming will do more harm than good to developing countriesD）hungry nations may benefit from the development of the poultry industry27.According to the author， in factory ，vegetable foodA） is easy for chickens to digestB） is insufficient for the needs of poultryC） is fully utilized in meat and egg productionD） is inefficiently converted into meat and eggs28.Western governments encourage the poultry industry in Asia because they regard it as aneffective way toA）boost their own exportsB）alleviate malnutrition in Asian countriesC）create job opportunities in Asian countriesD）promote the exports of Asian countries29.The word “carcass”（Line 2，Para.3）most probably means “”。A）vegetables preserved for future useB）the dead body of an animal ready to be cut into meatC）expensive fd that consumers can hardly affordD）meat canned for future consumption30.What the last paragraph tells us is the authors.A）detailed analysis of the ways of raising poultry in BangladeshB）great appreciation of the development of poultry industry in BangladeshC）critical view on the development of the poultry industry in BangladeshD）practical suggestion for the improvement of the poultry industry in BangladeshPassage 2We all have offensive breath at one time or another. In most cases， offensive breath emanates from bacteria in the mouth， although there are other， more surprising causes.Until a few years ago， the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition. Bad breath can happen whenever the normal flow of saliva （唾液） slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evil smelling gases， the worst of which is hydrogen sulfide （硫化物）。Mouth bacteria thrive in airless conditions. Oxygen-rich saliva keeps their numbers down. When we sleep， for example， the saliva stream slows， and sulfur-producing bacteria gain the upper hand ，producing classic “morning breath”。Alcohol， hunger， too much talking， breathing through the mouth during exerciseanything that dries the mouth produces bad breath. So can stress， though it s not understood why. Some peoples breath turns sour every time they go on a job interview.Saliva flow gradually slows with age， which explains why the elderly have more bad breath trouble than younger people do. Babies， however， who make plenty of saliva and whose mouths contain relatively few bacteria have characteristically sweet breath.For most of us， the simple， dry-mouth variety of bad breath is easily cured