partⅰlistening comprehension(20 points)(略)
partⅱreading comprehension(30 points)
directions:in this section there are four passages.each of them is followed by some questions.for each question there are four suggested answers marked a),b),c),and d).you should decide on the best choice and mark the corresponding letter on the answer sheet with a single line through the center.
questions 21-25 are based on the following passage.
by far the most common snake in britain is the adder(奎蛇).in scotland,in fact,there are no other snakes at all.the adder is also the only british snake with a poisonous bite.it can be found almost anywhere,but prefers sunny hillsides and rough open country,including high ground.in ireland there are no snakes at all.
most people regard snake bites as a fatal(致命的)misfortune,but not all bites are serious,and very few are fatal.sometimes attempts at emergency treatment turn out to be more dangerous than the bite itself,with amateurs(外行人)heroically,but mistakenly,trying do-it-yourself surgery(手术)and other unnecessary measures.
all snakes have small teeth,so that all snakes can bite,but only the bite of the adder presents any danger.british snakes are shy animals and 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 wa6y 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 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.
21.adders are most likely to be found _______.
a)in wider parts of britain and ireland b)in scotland but nowhere else c)on wild land through britain d)in the countryside in england
22.if you are with someone who is bitten by an adder,you should ______.
a)try to catch the snake b)not treat the bite yourself c)not worry too much about the victim d)operate him as soon as possible
23.we are told that adders _______.
a)normally friendly towards people b)unlikely to bite except in self-defense c)likely to attack people whenever they see them d)not afraid of human beings
24.if an adder hears you approaching,it will usually ______.
a)move out of your path b)take no notice of you at all c)disappear very quickly d)wait until you are close and then attack
25.which of the following is true according to the passage?
a)adders are more likely to attack children than adults.b)the adder prefers to bite a person with a heavy body.c)the danger of adder bites is different from person to person.d)in most cases adder bites are more serious than other illnesses.