[填空题]Children need a lot more from adults to enhance their creativity.

[单项选择]A study of adults who suffer from migraine headaches revealed that a significant proportion of the study participants suffer from a complex syndrome characterized by a set of three symptoms. Those who suffer from the syndrome experienced excessive anxiety during early childhood. As adolescents, these people began experiencing migraine headaches. As these people approached the age of 20, they also began to experience recurring bouts of depression. Since this pattern is invariant, always with excessive anxiety at its beginning, it follows that excessive anxiety in childhood is one of the causes of migraine headaches and depression in later life.
The reasoning in the argument is vulnerable to criticism on which one of the following grounds
A. It does not specify the proportion of those in the general population who suffer from thesyndrome.
B. It fails to rule out the possibility that all of the characteristic symptoms of the syndrome have a common cause.
C. It makes a generalization that is inconsistent with the evidence.
D. It fails to demonstrate that the people who participated in the study are representative of migraine sufferers.
E. (E) It does not establish why the study of migraine sufferers was restricted to adult participants.

[简答题]Modern chickens fight more because they need more food and water to lay more eggs. About 35 percent of them die because of fights. As a result, many farmers are forced to cut the beaks(鸟嘴，喙) of their chickens to prevent them from harming each others.

[单项选择]Adults typically need seven to nine hours of sleep each night to feel fully rested and function at their best. (1) , Americans are getting less sleep than they did in the past. A 2005 National Sleep Foundation poll found that Americans (2) 6.9 hours of sleep per night, which represents a drop of about two hours per night (3) the 19th century, one hour per night over the past 50 years, and about 25 minutes per night just since 2001.
(4) , we are not very good at perceiving the (5) effects of sleep deprivation. Researchers at the University of Pennsylvania restricted (6) to less than six hours in bed per night for two weeks. The volunteers (7) only a small increase in sleepiness and thought they were (8) relatively normally. However, formal testing showed that their cognitive abilities and reaction times (9) declined during the two weeks. By the end of the two-week test, they were as (10) as subj