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22. According to the passage， the experience of helplessness causes rats to ______. A) try to control unpleasant stimuli B) turn off the electricity C) become abnormally suspicious D) behave passively in controllable situations 注：定位第二段But之后那句话 23. The reason why the mice in Ader s experiment avoided saccharin was that ______ 。 A) they disliked its taste B) it affected their immune systems C) it led to stomach pains D) they associated it with stomachaches 24. The first paragraph is mainly about _____. (A) the teenagers criticism of their parents (B) misunderstandings between teenagers and their parents (C) the dominance of the parents over their children (D) the teenagers ability to deal with crises 注：段落主旨，B和C只说了一部分。 It is natural for young people to be critical of their parents at times and to blame them for most of the misunderstandings between them. They have always complained， more or less justly， that their parents are out of touch with modern ways; that they are possessive and dominant that they do not trust their children to deal with crises; that they talk too much about certain problems and that they have no sense of humour， at least in parent-child relationships. I think it is true that parents often underestimate their teenage children and also forget how they themselves felt when young. Young people often irritate their parents with their choices in clothes and hairstyles， in entertainers and music. This is not their motive. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then， if it turns out that their music or entertainers or vocabulary or clothes or hairstyles irritate their parents， this gives them additional enjoyment. They feel they are superior， at least in a small way， and that they are leaders in style and taste. | 
