In Scotland, in fact, there are no other kinds of poisonous snakes. It can be found almost everywhere, 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（自我治疗）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, and this 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 varies considerably. It depends upon several things, one of which is the body-weight of 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．Adders are to be found ________. A．in many parts of Britain and Ireland B．everywhere in Britain except Scotland C．on wild land 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-defence C．fond of attacking anyone in their area D．not afraid of human beings

By far the most common snake in Britain is the adder（蝰蛇）. In Scotland, in fact, there are no other kinds of poisonous snakes. It can be found almost everywhere, 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（自我治疗）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, and this 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 varies considerably. It depends upon several things, one of which is the body-weight of 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．Adders are to be found ________.
A．in many parts of Britain and Ireland
B．everywhere in Britain except Scotland
C．on wild land 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-defence
C．fond of attacking anyone in their area
D．not afraid of human beings