第5题: [单项选择]In the last paragraph the author points out that A. sleeping less is good for human development. B. people ought to be persuaded to sleep less than before. C. it is incorrect to say that people sleep too little. D. those who can sleep less should be encouraged. 参考答案:D 答案解析:此题为细节理解题。据第3段第4句可知。作者认为那些生来就可以少睡觉而且不误工作、玩耍的人不应受到约束,故选D。在第3段最后1句中,作者猜测如果将来人类可以少睡觉多做有益的活动是一种进步(advance