Ⅱ 语言知识及应用(共两节，满分35分)
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 except one. She suddenly started to walk in her 21_____. 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.
