第一节完形填空 (共10小题；每小题2分，满分20分)
阅读下面短文，掌握其大意，然后从21~30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。
Mary Kimble Smith was an ordinary 12-year-old girl; ordinary, that is, in every way    21          one. She suddenly started to walk in her sleep. No one knew why this happened. The best guess seems to be that it represents   22           : the sleep-walker is worried. This feeling normally remains under control during      23              hours, but at night, when the mind is in a more passive mode, it   24              to the surface and shows itself in the form of physical movement.
At first, her family   25          help from just about every doctor they could find. But none of them were able to suggest a means by which she could be    26        . Then her parents were frightened, and they tried to wake her up. In fact, the general advice is that we should not wake a sleep-walker. To wake a person and bring them to a sudden   27       that they are not where they thought they were could   28      the feelings of anxiety and perhaps even reinforce (强化) the habit.
Most sleep-walkers at last stop without any warning — they just           29         do it again. In Mary’s case though, she started sleep-walking soon after her twelfth birthday and was still doing it the day 30        she died in 1989, at the age of 93.
21. A. beside                 B. except                     C. besides                     D. including
22. A. anxiety               B. excitement         C. anger                       D. fear
23. A. daytime                     B. night                        C. sleeping                   D. waking
24. A. rises                          B. falls                         C. reduces                    D. raises
25. A. looked                B. searched                   C. obtained                   D. sought
26. A. helped                B. saved                       C. cured                       D. improved
27. A. recognition         B. realization         C. knowledge         D. impression
28. A. develop                     B. increase                    C. form                        D. produce
29. A. sometimes           B. often                        C. never                       D. usually
30. A. before               B. after                        C. when                       D. since