With around 100 students scheduled to be in that 9 am Monday morning lecture, it is no surprise that almost 20 people actually make it to the class and only 10 of them arc still awake after the first IS minutes; it is not even a surprise that most of them are still in their pyjamas (睡衣). Obviously, students are terrible at adjusting their sleep cycles to their daily schedule.
All human beings possess a body clock. Along with other alerting (警报) systems, this governs the sleep/wake cycle and is therefore one of the main processes which govern sleep behaviour. Typically, the preferred sleep/wake cycle is delayed in adolescents, which leads to many students not feeling sleepy until much later in the evenings. This typical sleep pattern is usually referred to as the "night owl" schedule of
This is opposed to the "early bird" schedule, and is a kind of disorder where the individual tends to stay up much past midnight. Such a person has great difficulty in waking up in the mornings. Research suggests that night owls feel most alert and function best in the evenings and at night. Research findings have shown that about 20 percent of people can be classified as "night owls" and only 10 percent can be classified as "early birds" - the other 70 percent are in the middle. Although this is clearly not true for all students, for the ones who are true night owls this gives them an excellent excuse for missing their lectures which unfortunately fall before midday.
43. What docs the author stress in Paragraph I?
A. Many students are absent from class.
B. Students are very tired on Monday mornings.
C. Students do not adjust their sleep patterns well.
D. Students are not well prepared for class on Mondays.
44. Which of the following is true according to Paragraph 2?
A. Most students prefer to get up late in the morning.
B. Students don't sleep well because of alerting systems.
C. One's body clock governs the sleep/wake cycle independently.
D. Adolescents' delayed sleep/wake cycle isn't the preferred pattern.
45. Which of the following is closest in meaning to the underlined word "classified"?
A. Criticised.           B. Grouped.          C. Organised.           D. Named.
46. What docs the text mainly talk about?
A. Functions of the body clock.                         
B. The "night owl" phenomenon.
C. Human beings' sleep behaviour.                     
D. The school schedule of "early birds".
【考点】考察科普知识类阅读
【文章大意】本文属于说明文中的科普类短文。很多学生在星期一上课时难以将他们的睡眠周期调整到正常为引子，解释了“night owl”这一睡眠周期现象。
43. 【答案】 C
【试题解析】推理题。文章开头it is no surprise that almost 20 people actually make it to the class and only 10 of them arc still awake after the first IS minutes;可知在星期一早上的课上只有20%的学生到位；在上课15分钟后还有10%的学生还醒着，甚至有人还穿着睡衣，而最终归结到第一段最后一句Obviously, students are terrible at adjusting their sleep cycles to their daily schedule。可知学生还没有调整好自己的睡眠模式。故C正确。
44. 【答案】 D
【试题解析】推理题。根据文章第二段2,3行the preferred sleep/wake cycle is delayed in adolescents醒睡周期在青少年身上被推迟了；以及第三段话1,2行This is opposed to the “early bird” schedule, and is a kind of disorder where the individual tends to stay up much past midnight可知，这种“night owl”现象是一种睡眠形式的紊乱，并不是好的睡眠周期。故D正确。
45. 【答案】 B
【试题解析】猜测词义题。根据此句Research findings have shown that about 20 percent of people can be classified as "night owls" and only 10 percent can be classified as "early birds" - the other 70 percent are in the middle.：调查结果表明大约20%的人可归类为“猫头鹰”型，只有10%的人可以归为“早起”型。此处classify应为“归类，分类”等意思。把不同的人分为不同的类型。故B正确。
46. 【答案】B
【试题解析】主旨大意题。本文通过星期一早晨学生很难从原来的睡眠模式里转换调整来导入“night owl”这一睡眠周期现象。故B正确。
【长难句解析】
With around 100 students scheduled to be in that 9 am Monday morning lecture, it is no surprise that almost 20 people actually make it to the class and only 10 of them arc still awake after the first I5 minutes;
【翻译】安全了大约100个学生参加星期一9点的演讲，一点也不令人惊讶的是几乎有20个人能够准时到位，在开始15分钟以后仍然有10个人还醒着
【分析】本句中含有一个with的复合结构With around 100 students scheduled to be in that 9 am Monday morning lecture。with复合结构在语法功能上相当于状语从句，其基本结构为：with+宾语+宾语补足语；宾语补足语可以是名词，代词，形容词，副词，现在分词，或者过去分词，也可以是不定式等。对宾语的情况进行补充说明。当宾语补足语中的动词与宾语构成被动关系的时候，使用过去分词的形式；当二者构成主动关系的时候，使用现在分词的形式。要特别要注意With的复合结构经常与独立主格结构转换使用。