11．Try this：For a whole day，forget about the clock．Eat when you're hungry and sleep when you're tired．What do you think will happen？
You may be surprised to find that your day is much like most other days．You'll probably get hungry when you normally eat and tired when you normally sleep．Even though you don't know what time it is，your body does．
Inside our bodies are several clocklike systems（系统）that follow a 24-hour cycle（循环）．Everyone is unique （唯一的），which is why you might like to stay up late while your sister always wants to go to bed early．
Regularly staying up late can make kids do worse on tests．And working at night leads to higher rates（比率）of heart disease．
"There is a growing sense that when we eat and when we sleep are important parts of how healthy we are，"says Steven Shea，Director of the Sleep Disorders Research Program at Brigham and Women's Hospital in Boston．
"During the night，we are ready to sleep，"Shea says．"During the day，we are ready to eat and move around．If you change what you are doing，everything is out of phase．That can have very bad result．"
52．According to the passage，if we forget about the clock，we willB．
A．forget the time
B．behave as usual
C．feel hungry
D．eat more food
53．A clocklike systemA．
A．has a 24-hour cycle
B．makes everyone unique
C．makes kids do worse on tests
D．leads to higher rates of heart disease
54．The underlined phrase"out of phase"meansD．
A．外面的
B．有序的
C．无助的
D．不协调的
55．The passage is written mainly to tell usB．
A．the growing sense is important to our health
B．we should follow clocklike system in our daily life
C．eat when you're hungry and sleep when you're tired
D．the clock like system makes your sister go to bed early．
分析 【文章主旨】这是一篇有关健康的阅读，短文主要叙述了没有了时钟人们的行为还是会按照日常的时间点，然后引出了我们应该遵循我们日常的生物钟，并通过具体论据来阐述我们应该遵循生物钟这个观点．
解答 52 B 细节理解题．根据文中第二段中的You may be surprised to find that your day is much like most other days你会很惊奇地发现你会和你大部分其他日子极其相似，可知没有了时钟你还会和平常的表现差不多．故选B．
53 A 细节理解题．根据文中第三段中的Inside our bodies are several clocklike systems（系统）that follow a 24-hour cycle在我们的身体里有很多24小时循环的像闹钟一样精准的系统．联系题中选项，故选A．
54 D 推理判断题．根据文中最后一段中的If you change what you are doing，everything is out of phase．That can have very bad result．"可知如果你改变了你所正做的，一切都会变的不协调，这会导致很坏的结果．结合题中的选项，A选项为外面的，不合语意；B选项为有序的，与文中表达意思相反；C选项为无助的，与文中意思相反．故选D．
55 B 主旨大意题．纵观全文，可知作者先叙述了没有了时钟人们的行为还是会按照日常的时间点，然后引出了我们应该遵循我们日常的生物钟，并通过具体论据来阐述我们应该遵循生物钟这个观点．结合选项，故选B．
点评 首先要仔细阅读文章，掌握大意，然后结合具体的题目再读短文，从中找出相关的信息，就可以确定正确答案．
