完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。
When I come across a good article in reading newspapers, I often want to cut and keep it. But just as I am about to do so I find the article on the   21  side is as much interesting. It may be a discussion of the way to   22   in good health, or   23   about how to behave and conduct oneself in society. If I cut the front article, the opposite one is likely to   24  damage, leaving out half of it or keeping the text   25  the title. Therefore, the scissors（剪刀）would 26   before they start,  27   halfway done when I find out the   28  result.
Sometimes two things are to be done at the same time, both worth your   29 .You can only take up one of them, the other has to wait or be  30   up. But you know the future is unpredictable（不可预料）—the changed situation may not allow you to do what is left   31  .Thus you are   32  in a difficult position and feel sad. How   33  that nice chances and brilliant ideas should gather around all at once? It may happen that your life   34   greatly on your preference of one choice to the other.
In fact that is what  35  is like: we are often   36  with the two opposite sides of a thing which are both desirable like a newspaper cutting. It often occurs that our attention is drawn to one thing only   37  we get into another. The latter may be more important than the  38  and give rise to a divided mind. I   39 remember a philosopher’s remarks:“When one door shuts, another opens in life.”So a casual（不经意） 40  may not be a bad one.
21. A. front                         B. same                 C. either                       D. opposite
22. A. get                                   B. keep                 C. lead                         D. bring
23. A. advice                      B. news                 C. a theory                   D. a report
24. A. suffer                        B. reduce               C. prevent                    D. cause
25. A. on                             B. for                    C. without                    D. off
26. A. use                            B. handle               C. prepare                    D. stop
27. A. or                             B. but                   C. so                            D. for
28. A. satisfying                   B. regretful            C. surprising                 D. impossible
29. A. courage                            B. strength             C. attention                   D. patience
30. A. given                         B. held                  C. made                       D. picked
31. A. near                          B. alone                C. about                       D. behind
32. A. filled                         B. attracted            C. caught                      D. struck
33. A. dares                         B. comes               C. deals                        D. does
34. A. improves                   B. changes             C. progresses                D. goes
35. A. study                         B. society                     C. nature                      D. life
36. A. faced                         B. supplied            C. connected                 D. fixed
37. A. before                       B. after                 C. until                        D. as
38. A. following                   B. next                  C. above                       D. former
39. A. still                           B. also                  C. once                        D. almost
40. A. treatment                   B. action               C. choice                      D. remark