Many people believe the glare（炫目的光）from snow causes snowblindness. Yet, with dark glasses or not, they find themselves suffering from headaches and watering eyes, and even snowblindness ,when exposed to several hours of“ snow light”.

　　The United States army has now determined that glare from snow does not cause snowblindness in troops in a snow -covered country. Rather ,a man’s eyes frequently find nothing to focus on （聚集） in a broad space of snow- covered without- grass land. So his gaze continually moves and jumps back and forth over the entire landscape in search of something to look at. Finding something, hour after hour, the eyes never stop searching and the eyeballs become tired and the eye muscles ache. Nature makes up for this discomfort by producing more and more fluid （流 体） which covers the eyeball. The fluid covers the eyeball in increasing quantity until it makes eyes difficult to see dearly, and the result is total, even though for a short time, snowblindness.

　　Experiments led the Army to a simple method of overcoming this problem. Scouts（侦察兵）ahead of the troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow - covered landscape. Even the scouts themselves throw lightweight, dark - colored objects ahead on which they can focus too. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching the snow -blanketed landscape. By focusing their attention on one object at a time. the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a continuous white land is overcome.

To prevent snowblindness caused by the strong light from snow, wearing glasses or not ________.

　　A. depends on whether the snow is white enough

　　B. makes no difference

　　C. makes much difference

　　D. depends on whether the snow is thick

When the eyes are tired, tears flow out ________.

　　A. to clear the vision

　　B. to make the eyes stop searching

　　C. to make the vision unclear

　　D. to produce more and more liquid

Snowblindness can be avoided ________.

　　A. by moving one’s gaze back and forth

　　B. by walking ahead and keeping looking around

　　C. by making up for the discomfort of one’s eyes

　　D. by providing the eyes with something to focus on

The weak and poor　　　  paid more attention to in a harmonious society.

A.is　　　　　B.　 are　　　　　C.be　　　　　D.has

III.完形填空（共20小题,每题1.5分,满分30分）

阅读下面短文,掌握其大意,然后从36-55各题所给的四个选项(A、B、C和D)中,选出最佳选项。

When children are very young, they learn from their grandparents and parents what is proper and good behavior.

A two-year-old child always  36  of himself or herself first. Sometimes, he or she tells people “This is  37 .” Of course, the  38  of sharing has to be  39  so that the child learns to  40  along with another child.

It is  41  for a family member to train the child so that he or she can  42  how to serve others and become a useful person in  43 . Discipline(纪律) should always be given with  44 .

Once a young child is taught to  45 , the child begins to realize that  46  is not a punishment but a valuable  47  in life. The idea of discipline becomes more important  48  the child is a student in elementary school..

If a person is  49 , he or she will not have  50  in life. If a person is trained, it doesn’t  51  what job he or she accepts, and there will be a  52  result. Parents and grandparents are very  53  that young children learn discipline early in their life, for happiness and pride will be the  54  of their achievements.

Usually, it is in middle school that children decide whether they will accept discipline as the road to success. For those who do, the  55  is very bright leading to a happy life.

36.A. cares          B. says 　　   C. speaks          D. thinks

37.A. mine          B. ours        C. theirs           D. yours

38.A. fact         B. idea         C. reason       D. mind

39.A. exchanged   B. introduced    C. brought          D. known

40.A. come          B. go          C. do             D. get

41.A. necessary   B. easy          C. hard         D. clear

42.A. learn     B. study     C. guess         D. remember

43.A. country    B. family    C. society       D. public

44.A. dislike    B. excitement   C. love        D. anger

45.A. live        B. share          C. play       D. work

46.A. homework  B. order       C. exam     D. discipline

47.A. lesson      B. text         C. class       D. work

48.A. though    B. because    C. since         D. when

49.A. taught     B. unknown        C. popular        D. untrained

50.A. help       B. business         C. success     D. purpose

51.A. matter    B. like     C. seem         D. appear

52.A. bad        B. good    C. final         D. natural

53.A. careful    B. worried    C. surprised      D. hopeful

54.A. example         B. reason    C. result         D. point

55.A. future      B. sun        C. day        D. sky

　 I grew up with my best friend, who was just like a sister to me. She was a little older than me. I 　36 to her. If ever I had a problem, she was always 　37 enough to help me out.

　 It wasn’t until the spring of“87” that I noticed a 　38 in her. She was quick to anger, and her attitude was 　39 . I asked her many times what was wrong. Her response each time was “I’m fine. ”

　 As time went on, she became more 　40 , and became a person I did not 　41 anymore. All I wanted was to help her. Every time I tried, she would get 　42 , and say she was fine.

　 The summer of“88”, I finally got my 　43 . My sister had changed due to the effects of 　44 . My mother 　45 put her arms around me, and told me my best friend had 　46 due to an over-dose (过度剂量). Well, for a minute my world stood still, along with my heart. There was nothing to say or do, just tears in the 　47 . Thinking over and over again, if only I had spent the time to notice the 　48 , maybe I could have saved her.

　 My mother, seeing my distress, sat me down and told me this.

　 Some things are not in our 　49 . Sometimes “signs” aren’t enough. You can’t 　50 yourself for the path your friend chose. What you can do is to learn from her mistake, 　51 at school for 　52 , let other children know what happened to your friend, and how it made you 　53 .

　 Since then I’ve never once blamed myself for her death. 　54 I volunteer my time to SADD and DARE. Each year, at an assembly I tell new students what happened and the 　55 of drugs.

36. A. came up　　　　　　　　　　　　　　　　　　　　　　　　 B. looked up

C. looked forward　　　　　　　　　　　　　　　　　　　　　 D. went over

37. A. quick　　　　　　　　 B. old　　　　　　　　　　　　　 C. clever　　　　　　　 D. close

38. A. change　　　　　　　 B. disease　　　　　　　　　　 C. decline　　　　　　　　　　 D. habit

39. A. polite　　　　　　　　 B. acceptable　　　　 C. poor　　　　　　　　 D. rude

40. A. bitter　　　　　　　　 B. weak　　　　　　　　 C. proud　　　　　　　 D. cold

41. A. respect　　　　　　　 B. stand　　　　　　　　 C. care　　　　　　　　　　　　 D. know

42. A. polite　　　　　　　　 B. defensive　　　　　 C. vague　　　　　　　 D. impatient

43. A. surprise　　　　　　　　　　 B. chance　　　　　　　　　　 C. answer　　　　　　　　　　 D. turn

44. A. drugs　　　　　　　　 B. loneliness　　　　　 C. illness　　　　　　　 D. sadness

45. A. tightly　　　　　　　　 B. tearfully　　　　　　 C. angrily　　　　　　　　　　 D. finally

46. A. passed　　　　　　　 B. left　　　　　　　　　　　　　 C. died　　　　　　　　　　　　 D. recovered

47. A. disaster　　　　　　　 B. trouble　　　　　　　　　　 C. disturbance　　　 D. silence

48. A. signs　　　　　　　　 B. effects　　　　　　　　　　 C. causes　　　　　　　　　　 D. results

49. A. way　　　　　　　　　　　　　 B. favor　　　　　　　　 C. control　　　　　　　　　　 D. side

50. A. help　　　　　　　　　　　　　 B. enjoy　 　　　　　　 C. destroy　　　　　　　　　 D. blame

51. A. attend　　　　　　　　 B. volunteer　　　　　 C. engage　　　　　　　　　　 D. settle

52. A. health-awareness B. self-improvement C. self-protection D. drug-prevention

53. A. feel　　　　　　　　　　　　　 B. think　　　　　　　　 C. act　　　　　　　　　　　　　 D. learn

54. A. Still　　　　　　　　　　　　　 B. Instead　　　　　　　　　　 C. Therefore　　　　 D. Anyhow

55. A. use　　　　　　　　　　　　　 B. consequence　　 C. danger　　　　　　　　　　 D. influence