Ⅳ. 阅读理解。
A
An hour in the morning is worth(值) two in the evening. Most of us know this. But for some people, getting out of bed each morning is a daily challenge. It can trouble their lives.
Now, scientists from Flinders University in Australia believe they have found out why: their body clocks are set too slow.
Professor Leon Lack studied people with delayed sleep disorder(睡眠延迟障碍). These people have one thing in common: they are not able to fall asleep at night, nor wake up on time in the morning.
“Most people have a 24-hour body clock. It's a natural rhythm(节奏) that influences sleepiness. But for people with delayed sleep disorder, it takes longer to complete the 24-hour body clock. So they usually go to bed later and wake up later,” Lack told the Daily Mail.
A slower body clock influences up to 15% of teenagers, according to the Daily Mail. It causes them to be late for school. Even though they do get to school, they're sleepy until their body clock wakes up.
Don't worry! There are some ways to bring your body clock back faster. Body clocks can be changed by environment, such as light. Make sure you're exposed(使暴露) to bright lights as early in the day as possible. It is a message to tell the body that it should be awake.
Also, stay away from the Internet and television for at least an hour before your bedtime. It helps you to relax before you fall asleep.
( )31. The first paragraph tells us that it is ______ for some people to get out of bed in the morning.
A. exciting B. difficult C. impossible D. educational
( )32. People with delayed sleep disorder ______.
A. are not able to wake up on time in the morning
B. are not able to complete the 24-hour body clock
C. are able to get up as quickly as they can
D. are able to fall asleep at night as early as they can
( )33. Which is NOT the fact that a slower body clock may influence teenagers?
A. They are late for school more often.
B. They feel sleepy in the morning class.
C. They feel relaxed to studying in the early morning.
D. They don't feel energetic until later in the morning.
( )34. How many ways to bring your body clock back faster are mentioned?
A. One. B. Two. C. Three. D. Four.
( )35. From the passage, we can know that ______.
A. morning is more important than evening
B. professor Leon Lack has a delayed sleep disorder
C. it helps you fall asleep if you're exposed to bright lights
D. we can improve delayed sleep disorder by changing body clocks