It was graduation day at the university where I work and a beautiful day quite unlike the first graduation I attended as a young professor．On that cold day years ago, as we watched the students walking into the hall, one of my colleagues turned to me and said, "Graduation will be one of the happiest and one of the saddest time of your life．" At my inquiry, he answered, "Because the students you have gotten to know have to leave．"

As years went by, my previous confusion about my colleague's words no longer existed．When I came across naughty students, I have had to rethink why I chose to be a teacher．It obviously isn't the money．Once a former computer science student of mine called me, asking me if I wanted to have a change．He was working at Nintendo Corporation．His salary was higher than my current one, though I have more education and have worked for over a decade．With my programming skills, he said he could get me hired．I thanked him, but declined his kind offer．

A few days before this current graduation, while working on final grades, I found a note a student had slipped in with her homework．She thanked me for being her teacher and said the things she had learned in my class—not about math, but about life—would be things she would remember long after the math skills had faded away．As I finished reading, I remembered why I had become a teacher．

Now, on this sunny graduation day, as I again observed the sea of blue hats and gowns, I did so with renewed dedication （奉献） and a deeper sense of satisfaction—I will always be grateful that I am a teacher．

51．Hearing his colleague's description of graduation for the first time, the author __________．

     A．quite agreed with his colleague                 B．was very puzzled

     C．thought it very funny                        D．was very sad

52．The computer science student called up the author because he___________．

     A．wanted to inform the author of his present job

     B．tried to persuade the author to work with him

     C．wanted the author to share his joy and satisfaction

     D．thought the author wasn't fit to be a teacher

53．The underlined part “blue hats and gowns” refers to___________．

     A．university colleagues                              B．graduates' clothes

     C．life memories                                    D．decorations in the hall

54．The author wrote this passage to __________．

     A．express his devotion to being a teacher

     B．compare two different graduation ceremonies

     C．talk about the meaning of graduation

     D．give advice on how to be a good teacher

Stephen Glenn is a famous scientist who has made several medical breakthroughs．When  31  why he was so much more   32   than the average person, he replied that it all came from an experience   33   his mom…At 2, he was trying to   34   a bottle of milk from the refrigerator when he   35   his hold on the slippery bottle and it fell, spilling （洒） its contents all over the kitchen floor! When his mom came in, instead of shouting at him or __36   him a lesson, she said, “Robert, what a great mess you’ve made! I’ve   37   seen such a sea of milk．Well, now that the   38   has been done, would you please get down and   39   in the milk for a while   40   we clean it up?”So happily he did．After that, his mom said, “Robert, whenever you make such a mess like this, you’ll have to clean it up and restore everything to its proper   41  ．So which do you prefer, a sponge, towel or mop?” He   42   the sponge and together they cleaned up the milk．His mom then said, “Robert, you’ve just had a   43  experiment about how to carry a big milk bottle __44  with two tiny hands．Now go to the sink to fill the bottle with   45   and see if you can discover a way to carry it safely．” Instantly Robert learned that he could   46   it if he grasped the bottle at the  47_  near the lip with both hands．

48  wonderful a lesson! The famous scientist then remarked it was then and there that he came to know that   49_   were just opportunities for learning something new, which is what scientific experiments are all about．

       Wouldn’t it be great if all parents could  50_  the way Robert’s mom did to him?

31．A．puzzled                  B．explained                 C．asked                     D．wondered

32．A．creative                  B．diligent                    C．cautious                 D．aggressive

33．A．beyond                   B．with                       C．about                     D．from

34．A．deliver                    B．remove                   C．ring                        D．make

35．A．dismissed                B．tightened                 C．caught                   D．lost

36．A．teaching                  B．punishing                C．directing                 D．taking

37．A．sometimes              B．always                    C．rarely                     D．mostly

38．A．experiment              B．damage                   C．work                      D．favor

39．A．drink                      B．gather                     C．swim                     D．play

40．A．after                       B．when                      C．before                   D．once

41．A．situation                  B．model                     C．order                      D．size

42．A．chose                     B．used                       C．liked                       D．saw

43．A．useless                   B．funny                     C．valid                       D．failed

44．A．effectively            B．heavily                    C．strongly                  D．luckily

45．A．milk                       B．water                      C．sand                       D．stones

46．A．complete                 B．try                          C．make                      D．get

47．A．bottom                   B．cover                      C．outside                   D．top

48．A．How                       B．Too                        C．Very                       D．What

49．A．tests                       B．mistakes                 C．exercises                D．achievements

50．A．react                      B．keep                       C．show                   D．look

It’s certainly hard work．But, ________, a man who wishes to have a career has to make a great many sacrifices．

       A．on the contrary                                      B．as a result      

       C．on the other hand                                     D．in addition

Authorities face a         task to persuade typhoon survivors to abandon their flood-stricken villages and relocate（重新安置）to lower and safer lands．

       A．sacred                    B．tough                      C．contemporary        D．conventional

Sometimes parents’ control of young kids will be thought to be such an invisible rope with which to tie them tightly that they        tried to cut it．

       A．thoroughly              B．desperately              C．visually                 D．extremely

The written record of our conversation doesn’t ______ what was actually said．There are a lot of mistakes．

       A．correspond with   B．relate to             C．compare with      D．communicate with

The shy girl felt ______ when she made some mistakes in her performance．

       A．bored             B．amused                   C．curious           D．awkward

The local government has been accused of not responding _________ to the needs of the homeless in the flood-stricken area．

       A．constantly                                                 B．appropriately            

       C．gradually                                                    D．entirely

After hours of searching, their patience was _________ and they found what they were looking for．

       A．calculated               B．confirmed               C．rewarded                D．evaluated

Despite the fact that all three teams ________ different approaches to the problem, they were all immediate successes．

       A．adopted                  B．attained                  C．adapted                  D．attached