C

Think about the last time you felt afraid. Was it a fear of height? Did you oversleep on a weekday and fear you’d get into trouble at the office? In any case, you know what it feels like to feel fear.

But one woman doesn’t The woman, code-named “UM”, gave her first-ever interview after years of being studied by a team of researchers. The woman is given a code name because the researchers want to protect her from anyone who would take advantage of her inability to feel afraid.

UM can’t tell you what fear is because she’s never experienced it. “I wonder what it’s like to actually be afraid of something,” she said. The formal name for the disease is Urbach-Wieth disease, which is characterized by a hoarse(粗哑的)voice，small bumps around the eyesand calcium deposits(钙沉积的)in the brain

In the case of UM，the disease has transformed the part of her brain that controls the human response to fearIn the interview, UM talks about an event in her life where she was held at knifepoint and gunpoint, “I was walking to the store，and I saw a man on a park bench.He said“Come here，please” so I went over to him. He grabbed me by the shirt，put a knife to my throat and told me he was going to cut meI told him, “Go ahead and cut me,” I wasn’t afraid at all. And for some reason，he let me go”

Doctors who have been studying UM’s condition for years have been trying different things that could strike fear into her. They finally figured something out—increasing UM’s carbon dioxide levels.Extra carbon dioxide concentration in the blood is known to cause fear and panic in health individualsIncreasing UM’s carbon dioxide levels did manage to give her a fright.

28The text starts by_______.

Achallenging the reader

B. solving daily problems

C. listing situations

D. giving explanations

29. Why is the woman with Urbach-Wieth disease given a code name?

A. To tell her case from other patients

B. To respect her privacy

C. To meet the researchers’ demands

D. To ensure her safety

30. From UM’s case，we can know that Urbach-Wieth disease may________.

Astop the brain from functioning normally

B. lead to a decrease in calcium deposits

C. stop the brain from responding quickly

D. lead to an increase in carbon dioxide

31. What will probably happen to UM from the last paragraph?

A. Dying of the Urbach-Wieth disease.

BGetting the sense of panic.

CExperiencing another danger.

DSpeaking with a hoarse voice.

With around 100 students scheduled to be in that 9:00 am Monday morning lecture, it is no surprise that almost 20 people actually make it to the class and only 10 of them are still awake after the first 15 minutes; it is not even a surprise that most of them are still in their pajama’s(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 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 sleep.

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.

32. What does the author stress in Paragraph 1 ?

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.

33. 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.

34. Which of the following is closest in meaning to the underlined word “classified”?

A. Criticized B. Grouped C. Organized D. Named

35. What does 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”.