A friend of mine met with an accident driving in darkness. His legs were so hurt that he couldn’t move. What was the 　36 was he found himself unable to ask for help-his mobile phone went out of 　37 as a result of exhausted battery. Nothing could be done but to

38 in cold wilderness. It was 8 hours later that day broke, and then the 　39 of the rescue.

　 It is almost 　40 that he could stand the horror in the darkness for so long. Even more surprising was his 41 : “First of all I checked up my 　42 conditions and found myself not in fatal danger. As there was no 　43 to call for help, I leaned back in my seat trying my best to keep the wound from 44 . In this way I dozed (打盹) off.”

His story put an end to my regret for the 　45 of an exploration adventure that happened last year. A group of young men 　46 to explore a mountain cave and got lost.

47 to find a way out in the dark cave they were frightened and ran anxiously without a sense of 　48 . Finally they fell dead in fear and exhaustion. According to the 　49　

people that found them, the place where they got lost was only about 10 meters away from the

50 of the cave. If they stayed on the spot when they lost their way and tried to 　51

themselves, they would probably sense a faint light glimmering (闪烁) not far away.

　 Don’t you think that you can compare it with 　52 itself? When you meet with obstacles in life and work, you are lost in darkness. 　53 you it’s unclear yet and you needn’t put up struggle 　54 . It seems to be a negative attitude, 　55 a person who can afford to do so must have foresight as well as a great courage in the first place.

36.A.hopeless　　　　　　　　　 B. worst　　　　　　　　　　　　 C. more D. best

37.A.service　　　　　　　　　　 B. way　　　　　　　　　　　　　　 C. order D. work

38.A.cry　　　　　　　　　　　　 B. lie　　　　　　　　　　　　　　　 C. wait D. sleep

39.A.delay　　　　　　　　　　　 B. success　　　　　　　　　　　 C. team D. arrival

40.A.untrue　　　　　　　　　　 B. unimaginable　　　　　　　 C. true D. useless

41.A.plan　　　　　　　　　　　　 B. decision　　　　　　　　　　　 C. explanation D. excuse

42.A.physical　　　　　　　　　 B. mental　　　　　　　　　　　　 C. working D. medical

43.A.method　　　　　　　　　　 B. way　　　　　　　　　　　　　　 C. alternative D. strength

44.A.rotting　　　　　　　　　　 B. spreading　　　　　　　　　　 C. hurting D. bleeding

45.A.loss　　　　　　　　　　　　 B. failure　　　　　　　　　　　　 C. disappointment D. sadness

46.A.had　　　　　　　　　　　　 B. managed　　　　　　　　　　 C. tried D. planned

47.A.Willing　　　　　　　　　　 B. Unable　　　　　　　　　　　　 C. Determined D. Deciding

48.A.hearing　　　　　　　　　　 B. sight　　　　　　　　　　　　　 C. feeling D. direction

49.A.rescue　　　　　　　　　　 B. village　　　　　　　　　　　　 C. local D. brave

50.A.end　　　　　　　　　　　　 B. top　　　　　　　　　　　　　　 C. opening D. side

51.A.save　　　　　　　　　　　　 B. help　　　　　　　　　　　　　　 C. stop D. calm

52.A.adventure　　　　　　　　 B. work　　　　　　　　　　　　　 C. life D. mankind

53.A.Mind B. Watch　　　　　　　　　　　　 C. Imagine D. Warn

54.A.really　　　　　　　　　　　 B. immediately　　　　　　　　 C. carefully D. hopefully

55.A.and　　　　　　　　　　　　 B. so　　　　　　　　　　　　　　　 C. but D. while

A friend of mine met with an accident driving in darkness. His legs were so hurt that he couldn’t move. What was the 　36 was he found himself unable to ask for help-his mobile phone went out of 　37 as a result of exhausted battery. Nothing could be done but to

38 in cold wilderness. It was 8 hours later that day broke, and then the 39 of the rescue.

　 It is almost 　40 that he could stand the horror in the darkness for so long. Even more surprising was his 41 : “First of all I checked up my 　42 conditions and found myself not in fatal danger. As there was no 　43 to call for help, I leaned back in my seat trying my best to keep the wound from 44 . In this way I dozed (打盹) off.”

His story put an end to my regret for the 　45 of an exploration adventure that happened last year. A group of young men 　46 to explore a mountain cave and got lost.

47 to find a way out in the dark cave they were frightened and ran anxiously without a sense of 　48 . Finally they fell dead in fear and exhaustion. According to the 　49　

people that found them, the place where they got lost was only about 10 meters away from the

50 of the cave. If they stayed on the spot when they lost their way and tried to 　51

themselves, they would probably sense a faint light glimmering (闪烁) not far away.

　 Don’t you think that you can compare it with 　52 itself? When you meet with obstacles in life and work, you are lost in darkness. 　53 you it’s unclear yet and you needn’t put up struggle 　54 . It seems to be a negative attitude, 　55 a person who can afford to do so must have foresight as well as a great courage in the first place.

36.A.hopeless B. worst C. more D. best

37.A.service B. way　　　　　　　　　　　　　　 C. order D. work

38.A.cry B. lie　　　　　　　　　　　　　　　 C. wait D. sleep

39.A.delay B. success　　　　　　　　　　　 C. team D. arrival

40.A.untrue　　　　　　　　　　 B. unimaginable　　　　　　　 C. true　　　　　　　　　　　　　　 D. useless

41.A.plan　　　　　　　　　　　　 B. decision　　　　　　　　　　　 C. explanation　　　　　　　　　 D. excuse

42.A.physical　　　　　　　　　 B. mental　　　　　　　　　　　　 C. working　　　　　　　　　　　 D. medical

43.A.method　　　　　　　　　　 B. way　　　　　　　　　　　　　　 C. alternative　　　　　　　　　 D. strength

44.A.rotting　　　　　　　　　　 B. spreading　　　　　　　　　　 C. hurting　　　　　　　　　　　　 D. bleeding

45.A.loss　　　　　　　　　　　　 B. failure　　　　　　　　　　　　 C. disappointment　　　　　　 D. sadness

46.A.had　　　　　　　　　　　　 B. managed　　　　　　　　　　 C. tried　　　　　　　　　　　　　 D. planned

47.A.Willing　　　　　　　　　　 B. Unable　　　　　　　　　　　　 C. Determined　　　　　　　　 D. Deciding

48.A.hearing　　　　　　　　　　 B. sight　　　　　　　　　　　　　 C. feeling　　　　　　　　　　　　 D. direction

49.A.rescue　　　　　　　　　　 B. village　　　　　　　　　　　　 C. local　　　　　　　　　　　　　 D. brave

50.A.end　　　　　　　　　　　　 B. top　　　　　　　　　　　　　　 C. opening　　　　　　　　　　　 D. side

51.A.save　　　　　　　　　　　　 B. help　　　　　　　　　　　　　　 C. stop　　　　　　　　　　　　　　 D. calm

52.A.adventure　　　　　　　　 B. work　　　　　　　　　　　　　 C. life　　　　　　　　　　　　　　 D. mankind

53.A.Mind　　　　　　　　　　　 B. Watch　　　　　　　　　　　　 C. Imagine　　　　　　　　　　　 D. Warn

54.A.really　　　　　　　　　　　 B. immediately　　　　　　　　 C. carefully　　　　　　　　　　 D. hopefully

55.A.and　　　　　　　　　　　　 B. so　　　　　　　　　　　　　　　 C. but　　　　　　　　　　　　　　 D. while

A friend of mine met with an accident driving in darkness. His legs were so hurt that he couldn’t move. What was the 　31　 was that he found himself unable to ask for help—his mobile phone went out of 　32　 as a result of exhausted battery (无电) . Nothing could be done but to 　33　 in cold wilderness (荒野). It was eight hours later that day broke, and then 　34　 of the rescue (援救).

　 It is almost 　35　 that he could stand （忍受）the horror in the darkness for so long. Even more surprising was his 　36　 : “First of all, I checked up my 　37　　 conditions and found myself not in mortal (致命的) danger. As there was no 　38　 to call for help, I leaned back in my seat trying my best to keep the wound from 　39　 . In this way I dozed (瞌睡) off.”

　 His story put an end to my regret (遗憾) for the 　40　 of an exploration adventure (探险) that happened last year. A group of young men 　41　 to explore a mountain cave and got lost. 　42　 to find a way out in the dark cave they were frightened and ran anxiously without a sense of 　43　 . Finally they felt dead in fear and exhaustion. According to the 　44 people that found them, the place where they got lost was only about 10 meters away from the 　45　 of the cave. If they stayed on the spot when they lost their way and tried to 　46　 themselves, they would probably sense a faint light glimmering (闪烁) not far away.

Don’t you think you can compare it with 　47　 itself? When you meet with difficulty in life and work, you are lost in darkness. 　48　 you it’s unclear yet and you needn’t put up struggle 　49 . It seems to be a negative （消极）attitude, 　50　 a person who can afford to do so must have foresight (远见) as well as a great courage in the first place.

31. A. hopeless　 　　　B. worst 　　　　　　C. more 　　　　　 D. best

32. A. service　 　　　 B. way　 　　　　　　C. control 　　　　 D. work

33. A. cry　 　　　　　B. lie 　　　　　　　 C. wait 　　　　　 D. sleep

34. A. delay 　　　　 B. success 　　　　　 C. team 　　　　　 D. arrival

35. A. untrue　 　　　B. unimaginable 　　　 C. true 　　　　　　D. useless

36. A. plan　 　　　　B. decision 　　　　　C. explanation 　　　 D. excuse

37. A. physical　 　　 B. mental　 　　　　 C. working　 　　　 D. medical

38. A. energy　 　　　 B. way　 　　　　　 C. tools 　　　　　　D. strength

39. A. rotting　 　　　 B. spreading　 　　　　 C. hurting　 　　　 D. bleeding

40. A. loss　 　　　　 B. failure　 　　　　　C. disappointment 　D. sadness

41. A. had　 　　　　 B. managed 　　　　　C. tried　 　　　　　D. meant

42. A. Willing　 　　　B. Unable　 　　　　　C. Determined　 　　D. Deciding

43. A. hearing　 　　　B. sight　 　　　　　 C. feeling 　　　　　D. direction

44. A. rescue　 　　　 B. village 　　　　　　C. local 　　　　　 D. brave

45. A. end　 　　　　 B. top　 　　　　　　C. opening　　　　 　D. side

46. A. save　 　　　　 B. help　 　　　　　　C. stop 　　　　　 D. calm

47. A. adventure 　　 B. work　 　　　　　　C. life　 　　　　　 D. mankind

48. A. Mind　 　　　 B. Watch　 　　　　　　C. Imagine 　　　　D. Warn

49. A. really　 　　　 B. immediately 　　　　 C. carefully 　　　 D. hopefully

50. A. and　 　　　　 B. so　 　　　　　　　 C. but　 　　　　　D. while

A friend of mine met with an accident driving in darkness. His legs were so hurt that he couldn’t move. What was the 　31　 was that he found himself unable to ask for help—his mobile phone went out of 　32　 as a result of exhausted battery (无电) . Nothing could be done but to 　33　 in cold wilderness (荒野). It was eight hours later that day broke, and then 　34　 of the rescue (援救).

　 It is almost 　35　 that he could stand （忍受）the horror in the darkness for so long. Even more surprising was his 　36　 : “First of all, I checked up my 　37　　 conditions and found myself not in mortal (致命的) danger. As there was no 　38　 to call for help, I leaned back in my seat trying my best to keep the wound from 　39　 . In this way I dozed (瞌睡) off.”

　 His story put an end to my regret (遗憾) for the 　40　 of an exploration adventure (探险) that happened last year. A group of young men 　41　 to explore a mountain cave and got lost. 　42　 to find a way out in the dark cave they were frightened and ran anxiously without a sense of 　43　 . Finally they felt dead in fear and exhaustion. According to the 　44 people that found them, the place where they got lost was only about 10 meters away from the 　45　 of the cave. If they stayed on the spot when they lost their way and tried to 　46　 themselves, they would probably sense a faint light glimmering (闪烁) not far away.

Don’t you think you can compare it with 　47　 itself? When you meet with difficulty in life and work, you are lost in darkness. 　48　 you it’s unclear yet and you needn’t put up struggle 　49 . It seems to be a negative （消极）attitude, 　50　 a person who can afford to do so must have foresight (远见) as well as a great courage in the first place.

31. A. hopeless　 　　　B. worst 　　　　　　C. more 　　　　　 D. best

32. A. service　 　　　 B. way　 　　　　　　C. control 　　　　 D. work

33. A. cry　 　　　　　B. lie 　　　　　　　 C. wait 　　　　　 D. sleep

34. A. delay 　　　　 B. success 　　　　　 C. team 　　　　　 D. arrival

35. A. untrue　 　　　B. unimaginable 　　　 C. true 　　　　　　D. useless

36. A. plan　 　　　　B. decision 　　　　　C. explanation 　　　 D. excuse

37. A. physical　 　　 B. mental　 　　　　 C. working　 　　　 D. medical

38. A. energy　 　　　 B. way　 　　　　　 C. tools 　　　　　　D. strength

39. A. rotting　 　　　 B. spreading　 　　　　 C. hurting　 　　　 D. bleeding

40. A. loss　 　　　　 B. failure　 　　　　　C. disappointment 　D. sadness

41. A. had　 　　　　 B. managed 　　　　　C. tried　 　　　　　D. meant

42. A. Willing　 　　　B. Unable　 　　　　　C. Determined　 　　D. Deciding

43. A. hearing　 　　　B. sight　 　　　　　 C. feeling 　　　　　D. direction

44. A. rescue　 　　　 B. village 　　　　　　C. local 　　　　　 D. brave

45. A. end　 　　　　 B. top　 　　　　　　C. opening　　　　 　D. side

46. A. save　 　　　　 B. help　 　　　　　　C. stop 　　　　　 D. calm

47. A. adventure 　　 B. work　 　　　　　　C. life　 　　　　　 D. mankind

48. A. Mind　 　　　 B. Watch　 　　　　　　C. Imagine 　　　　D. Warn

49. A. really　 　　　 B. immediately 　　　　 C. carefully 　　　 D. hopefully

50. A. and　 　　　　 B. so　 　　　　　　　 C. but　 　　　　　D. while

　　We speak of the balance of nature． Biologists talk about biotic pyramids and the web of life． Both are referring to the same phenomenon or existing fact : the many complex ( 复杂的）relationships among organisms and their environment or surroundings．

　　The pyramid is the biologist’s attempt and try to sketch and describe the energy relationships in nature． You could call it a catalogue or describing record of who eats whom． The land forms the base of the pyramid, and upon it rests a layer or covering or a thickness of plants． Insects such as ants and worms, and herbivores or plant-eating animals, then birds and rodents such as rats and mice, and finally, at the top of the pyramid, the large carnivores or flesh-eating animals, and predatory birds which hunt and eat other animals． Organisms at each level of the pyramid exist by eating those in the layers below, and so are dependent for their survival on the existence of the members of the lower layers．

　　From the base of the pyramid to the top, populations of organisms decrease． There are always, for example, fewer hawks than gophers, a kind of rats, their prey, and always fewer insects than the plants they eat． But most species of organisms exist on more than one kind of food;each organism forms only one link or ring in a chain of energy transfer or change． These pathways by which energy is cycled through organisms are called food chains． The relationships between organisms form a complex network through which energy from the soil is passed into living things and then, through death and decay or rotting, is returned to the soil． Some energy is always lost in the process or course, and is continually replaced or take the place of by energy from the air and sun through plants, during the process of photosynthesis． But in spite of these gains and losses, the total system does not change much unless interfered with, by man or if man is not in the way． This system is the web of life, a tangle of' food chains, so complicated that we do not yet understand all its workings．

　　But man's interference has changed many of the relationships． For example, the food chain formed by the soil, bunch-grass, deer, and cougar has been changed to the chain: soil, alfalfa, cow, farmer． Will such changes have serious effects or influence upon the existence of other organisms forming part of the web? If so, what will these effects be, and will they be good or bad? Can we change the web of life without losing something of value in the process? These are some of the questions which the ecologist tries to answer．

　　Our understanding of the energy relationships in nature is still very limited, but what we have learned so far tells us clearly that when we change the web of life, we run the risk of or we are in danger of losing something which cannot be replaced．

　　The following story is a true one, and is happening in British Columbia today． It is a dramatic illustration of the energy relationships between organisms, and of the effect man’s intervention has had on the web of life．

1．What is the passage mainly about?

A．Organisms and life．

B．Energy and the balance of nature．

C．A catalogue of who eats whom．

D．Biotic pyramids, webs of life and food chains．

2．The word organisms refers to 　　　　　　 ．

A．life B． energy C． attempt D． relationships

3．A grasshopper is 　　　　　　　　 ．

A．an insect B． a herbivore　　C． a rodent D． a carnivore

4．Vegetation is 　　　　　　　　 ．

A．birds B． animals　　C． plants D． organisms

5．Look at the picture below． How many food chains can you find in it?

A．2 ． B． 4．　　C． 5． D． 6．

6．The _____is a rodent like a ______．

A．weasel, frog　　B． grasshopper, rabbit C． frog, rat D． rabbit, mouse

7．If we change the picture of the passage into a pyramid, the _____ is at the top, the ____ at the second layer and the ______ is at the 3rd layer while _____are at the base．

A．hawk, weasel, mouse, plants

B．hawk, grasshopper, rabbit, mice

C．grasshopper , weasel, rabbit , plants

D．hawk, plants, grasshopper, rabbits

8．The population of grasshoppers is always _____ that of frogs．

A．smaller than B． greater than C． the same as D． different from

9．According to the passage, which of the following sayings is true?

A．Food chains are a death and decay process．

B．Photosynthesis is an energy losing process．

C．Each kind of living thing eats only one kind of food．

D．Most kinds of living thing live on more than one kind of organism．

10．What is the passage following this passage most probably about? It is about ______．

A．British Columbia

B．a dramatic illustration

C．man’s influence on the web of life in a certain place

D．the energy relationships between organisms and man’s influence on the web of life