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Some snakes eat other snakes, even poisonous ones. The poison does not do them any harm(伤害). Snakes can swallow(吞下) things that are bigger around than they themselves are. This is possible because the jawbones(腭骨) are loosely joined, and the mouth can stretch（伸展）to make room for a fat animal. The snake’s slim body stretches to make space for the animal when it is inside.
Many snakes eat birds’ eggs or frogs（青蛙）. Others eat pests（害虫）, mice and other animals that harm crops on farms. Because snakes do this valuable work, you should never kill one. It is too dangerous for you to kill a poisonous one. Leave that job to experts.
1. Which of the following groups of food is usually had by a snake?
A. Mice, crops, birds’ eggs.
B. Pests, frogs, some animals, plants.
C. Birds’ eggs, frogs, all animals, other snakes.
D. Mice, frogs, pests, some animals, other snakes.
2.We should not kill a snake because
A. it is poisonous
B. it can do something useful for man
C. it will strike you in return
D. we are not experts
3.Snakes may do some valuable work by
A. eating pests, mice and some harmful animals
B. doing harm to other animals
C. eating birds’ eggs and frogs
D. both A and C
4.In writing this passage the writer mainly wants us to
A. have a better impression(印象) about snakes
B. like snakes
C. kill snakes with the help of experts
D. regard snakes as one of man’s best friends
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Some snakes eat other snakes, even poisonous ones. The poison does not do them any harm(伤害). Snakes can swallow(吞下) things that are bigger around than they themselves are. This is possible because the jawbones(腭骨) are loosely joined, and the mouth can stretch（伸展）to make room for a fat animal. The snake’s slim body stretches to make space for the animal when it is inside.
Many snakes eat birds’ eggs or frogs（青蛙）. Others eat pests（害虫）, mice and other animals that harm crops on farms. Because snakes do this valuable work, you should never kill one. It is too dangerous for you to kill a poisonous one. Leave that job to experts.
60. Which of the following groups of food is usually had by a snake?
A. Mice, crops, birds’ eggs.
B. Pests, frogs, some animals, plants.
C. Birds’ eggs, frogs, all animals, other snakes.
D. Mice, frogs, pests, some animals, other snakes.
61. We should not kill a snake because
A. it is poisonous B. it can do something useful for man
C. it will strike you in return D. we are not experts
62. Snakes may do some valuable work by
A. eating pests, mice and some harmful animals
B. doing harm to other animals
C. eating birds’ eggs and frogs
D. both A and C
63. In writing this passage the writer mainly wants us to
A. have a better impression(印象) about snakes
B. like snakes
C. kill snakes with the help of experts
D. regard snakes as one of man’s best friends
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阅读理解
By far the most common snake in Britain in the adder(蝰蛇).In Scotland, in fact, there are no other kinds of poisonous snakes. It can be found almost anywhere, but it prefers sunny hillsides and rough open country, including high ground. In Ireland there are no snakes at all.
Most people regard snake bites as deadly, but not all bites are serious, and very few are deadly. Sometimes attempts at emergency treatment turn out to be more dangerous than the bite itself , with someone heroically, but mistakenly, trying do-it-yourself surgery and other unnecessary measures.
All snakes have small teeth, so it follows that all snakes can bite, but only the bite of the adder presents any danger. British snakes are shy animals and are far more frightened of you than you could possibly be of them. The adder will attack only if it feels threatened, as can happen if you take it by surprise and step on it accidentally, or if you try to catch it or pick it up, which it dislikes intensely. If it hears you coming, it will normally get out of the way as quickly as it can, but adders cannot move very rapidly and may attack before moving if you are very close.
The effect of a bite varied considerably. It depends upon several things, one of which is the body-weight of the person bitten. The bigger the person, the less harmful the bite is likely to be. Which is why children suffer far more seriously from snake bites than adults. A healthy person will also have better resistance against the poison.
Very few people actually die from snake bites in Britain, and though these bites can make some people very will, there are probably just as many cases of bites having little or not effect, as there are of serious illness.
1．Adders are to be found ________.
[ ]
A．in many parts of Britain and Ireland
B．everywhere in Britain except Scotland
C．on wild ladn throughout Britain except Ireland
D．in shady fields in Scotland
2．If you are with someone who is bitten by an adder, you should ________.
[ ]
A．try to catch the adder
B．make no attempt to treat the bite by yourself
C．not worry about the victim
D．operate on him as soon as possible
3．We are told that adders are ________,
[ ]
A．normally friendly towards people
B．unlikely to bite except in self-defense
C．fond of attacking anyone in their territory
D．not afraid of human beings
4．In general, British people think snakes are ________.
[ ]
A．not very common in Britain
B．not all very dangerous
C．capable of killing people by their bites
D．no threat to human beings.
查看习题详情和答案>>By far the most common snake in Britain is the adder (蝰蛇)．In Scotland, in fact, there are no other kinds of poisonous snake．It can be found almost anywhere, but it prefers sunny hillsides and rough open country, including high ground．In Ireland there are no snakes at all．
Most people regard snake bites as deadly, but not all bites are serious, and very few are deadly．Sometimes attempts at emergency treatment turn out to be more dangerous than the bite itself, with someone heroically, but mistakenly, trying do-it-yourself surgery (外科手术) and other unnecessary measures．
All snakes have small teeth, so it follows that all snakes can bite, only the bite of the adder presents any danger．British snakes are shy animals and are far more frightened of you than you could possibly be of them．The adder will attack only if it feels threatened, as can happen if you take it by surprise and step on it accidentally, or if you try to catch it or pick it up, which it dislikes strongly．If it hears you coming, it will normally get out of the way as quickly as it can, but adders cannot move very rapidly and may attack before moving if you are very close．
The effect of a bite changes considerably．It depends upon several things, one of which is the body-weight of the person bitten．The bigger the person, the less harmful the bite is likely to be, which is why children suffer far more seriously from snake bites than adults．A healthy person will also have better resistance against the poison．
Very few people actually die from snake bites in Britain, and though these bites can make some people very ill, there are probably just as many cases of bites having little or no effect, as there are of serious illness．
1．Where do you know adders are to be found?
[ ]
A．In many parts of Britain and Ireland．
B．Everywhere in Britain except in Scotland．
C．On wild land throughout Britain．
D．In shady fields in Scotland．
2．If you are with someone who is bitten by an adder, you should________．
[ ]
A．try to catch the adder
B．make no attempt to treat the bite by yourself
C．not worry about the victim (受害者)
D．operate on him as soon as possible
3．We are told that adders are________．
[ ]
A．normally friendly towards people
B．unlikely to bite except in self-defence
C．fond of attacking anyone in their territory
D．not afraid of human beings
4．If an adder hears you coming, it will usually________．
[ ]
A．take no notice of you at all
B．attack you before moving away
C．wait until you are close and then attack
D．move out of your path
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