题目列表(包括答案和解析)
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Some people can stay up all night and still get work done the next day. I’m not one of them. After a night without enough sleep, I feel sleepy. I have trouble remembering things. And all I want to do is to go back to bed and sleep.
How do you feel after you’ve stayed up late to finish schoolwork? Or the day after a slumber(睡眠) party? Scientists now say that your answers to these questions may depend on your genes, which tell our bodies and brains what to do. People have about 40,000 genes, and each gene can have different forms.
A new research suggests that a gene called period3 affects how well you function without sleep. The discovery adds to older evidence that period3 helps determine whether you like to stay up late or get up early.
The period3 gene comes in two forms: short and long. Everyone has two copies of the gene. So, you may have two longs, two shorts, or one of each. Your particular combination depends on what your parents passed on to you.
Scientists studied 24 people who had to stay awake for 40 hours straight. Then they took tests that measured how well they could remember lists of numbers.
Results showed that the people with the short form of period3 performed much better than those with the long form did. In both groups, people performed worst in the early morning. After the first round of experiments, participants were finally allowed to sleep. People in the group that performed well on the tests took about 18 minutes to nod off(瞌睡).
People with long period3 gene fell asleep in just 8 minutes. They also spent more time on deep sleep. That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working in top form.
I think I must have the long form period3. What about you?
68. The purpose of the writer in the first paragraph is to ____________.
A. attract readers to the topic of the passage
B. show his /her poor memory for things
C. show his /her envy of those energetic people
D. prove his/her need for sleep
69. Whether you can stay up or not depends on___________.
A. the size of your brain B. the kind of genes you have
C. your health D. your will
70. The aim of the research is to _______.
A. find a new gene called period3 B. find out how genes affect a person’s need for sleep
C. test how long you can stay awake D. measure how good your memory is
Some people can stay up all night and still get work done the next day. I’m not one of them. After a night without enough sleep, I feel sleepy. I have trouble remembering things. And all I want to do is to go back to bed and sleep.
How do you feel after you’ve stayed up late to finish schoolwork? Or the day after a slumber party? Scientists now say that your answers to these questions may depend on your genes, which tell our bodies and brains what to do. People have about 40,000 genes, and each gene can have different forms.
A new research suggests that a gene called period3 affects how well you function without sleep. The discovery adds to older evidence that period3 helps determine whether you like to stay up late or get up early.
The period3 gene comes in two forms: short and long. Everyone has two copies of the gene. So, you may have two longs, two shorts, or one of each. Your particular combination depends on what your parents passed on to you.
Scientists studied 24 people who had to stay awake for 40 hours straight. Then. they took tests that measured how well they could remember lists of numbers.
Results showed that the people with the short form of period3 performed much better than those with the long form did. In both groups, people performed worst in the early morning. After the first round of experiments, participants were finally allowed to sleep. People in the group that performed well on the tests took about 18 minutes to nod off(磕睡)
People with long period3 gene fell asleep in just 8 minutes. They also spent more time on deep sleep. That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working in top form.
I think I must have the long form period3. What about you?
58. The purpose of the writer in the first paragraph is to ____________.
A. show his /her envy of those energetic people
B. show his /her poor memory for things
C. attract readers to the topic of the passage
D. prove his/her need for sleep
59. Whether you can stay up or not depends on___________.
A. the size of your brain B. your will
C. your health D. the kind of genes you have
60. The aim of the research is to _______.
A. find a new gene called period3
B. find out how genes affect a person’s need for sleep
C. test how long you can stay awake
D. measure how good your memory is
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| Tips to keep a hearty conversation flowing On holidays we typically gather with our nearest and dearest. But 1 can be made, maintained and broken through the ways we talk to our loved 2 , according to Deborah Tannen, a George-town University professor in linguistics (语言学). She has suggestions as to how we can 3 communications at our festival dinner tables. Let's take a look. ＊A round dinning table is best for promoting a 4 conversation because everyone 5 each other. ＊Avoid 6 grandparents at the ends of a rectangular (长方形的) table, even though it is the traditional place of 7 . Elderly people may feel lonely there if they are unable to hear or keep 8 a conversation. ＊ 9 prefer to face each other and make eye contact when they talk. In contrast, men tend to look around at other things. "Guys may be more 10 keeping gazing on the TV," says Tannen. "They'll still be 11 , though.” ＊Be aware that people have different ways of talking. Each person has a different 12 of tone, rhyme, timing and how 13 of a pause is normal in a conversation. Watch for people who seem left 14 . If you feel you are doing all the talking, hold back to give others a 15 . If you feel you aren't getting a chance to speak, try pushing yourself to start 16 . ＊People sometimes get upset on big festivals 17 they stay too long in the apartment. Some families find that gatherings go more 18 if they plan for some fun 19 . So why not get a breath of fresh air? Going to a park for a walk or taking a trip to the zoo may be more 20 than just sitting around inside. | |||
| ( )1. A. demands ( )2. A. ones ( )3. A. bother ( )4. A. lively ( )5. A. scolds ( )6. A. checking ( )7. A. pity ( )8. A. up with ( )9. A. Grown-ups ( )10. A. surprised ( )11. A. thinking ( )12. A. matter ( )13. A. often ( )14. A. out ( )15. A. reward ( )16. A. talking ( )17. A. until ( )18. A. naturally ( )19. A. indoors ( )20. A. abstract |
B. relationships B. those B. delay B. short B. blames B. hiding B. sorrow B. off B. Men B. relaxed B. doubting B. sense B. long B. behind B. gift B singing B. if B. coldly B. outside B. bitter |
C. victories C. others C. damage C. calm C. faces C. seating C. intelligence C. away from C. People C. encouraged C. listening C. direction C. soon C. over C. hand C. dancing C. though C. quickly C. inside C. enjoyable |
D. mistakes D. them D. improve D. dull D. annoys D. hurting D. honor D. out of D. Women D. upset D. looking D. point D. far D. off D. chance D. playing D. since D. smoothly D. everywhere D. cruel |
I never know how well Mother could keep a trust until I was going through her things after she died. I discovered something I had 1 forgotten, something that happened to me as a child.
One night, as I lay in bed 2 my sister and I had said our prayers, I recalled the events of the day and how 3 I had behaved towards Mother. “I must make things right before going to sleep,” I thought.
Quickly I 4 out of bed and picked up a pencil and paper, then tiptoed into the hall. The 5 from the living room shone dimly. I knew Mother was downstairs mending socks.
I quickly 6 a note asking Mother to forgive me for being so 7 . I didn’t want my brothers and sisters to know our 8 so I added a postscript: “Please don’t let anyone see this.” Then I quietly moved 9 my parents’ bedroom and put the letter under Mother’s pillow.
The next morning, when I 10 my bed after breakfast, I unexpectedly 11 a note under my pillow. Mother wrote that she loved me and 12 me.
This became my 13 of apologizing whenever I talked back or disobeyed. Mother always left a note, but she never 14 our under-the-pillow messages in front of the family. Even when we were 15 , she never mentioned them when we brothers and sister recalled our childhood.
When Mother 16 , I had to go through her personal belongings. In her desk was a bundle of notes tied with a faded ribbon （布条）. On top was a message in her handwriting. It read, “In the event of my death, please 17 these.”
I 18 the packet and glanced at the handwriting on the bottom. To my surprise, I 19 my childish writing, “P.S. Please don’t let anyone see this. Love, Edie.”
I gently placed the unopened bundle in the 20 along with other things for the rubbish burner. “Lord,” I prayed, “make me like my mother.”
1. A. long B. just C. never D. often
2. A. before B. after C. until D. since
3. A. well B. politely C. happily D. badly
4. A. jumped B. fell C. moved D. slipped
5. A. moon B. light C. needle D. thread
6. A. found B. sent C. wrote D. took
7. A. lazy B. late C. careless D. naughty
8. A. mistake B. business C. relation D. love
9. A. out of B. around C. into D. behind
10. A. searched B. left C. made D. went to
11. A. wrote B. left C. found D. gave
12. A. missed B. understood C. supported D. forgave
13. A. way B. secret C. favorite D. trick
14. A. spoke about B. passed round C. gave out D. read aloud
15. A. happy B. curious C. grown D. interested
16. A. went away B. passed away C. die away D. break away
17. A. destroy B. keep C. hide D. read
18. A. picked up B. handed in C. looked through D. turned over
19. A. recognized B. lost C. realized D. liked
20. A. drawer B. wastebasket C. bedroom D. bookshelf
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| I never knew how well Mother could keep a trust until I was going through her things after she died. I discovered something I had 1 forgotten, something that happened to as a child. One night, as I lay in bed 2 my sisters and I had said our prayers, I recalled the events of the day and how 3 I behaved toward Mother."I must make things right before going to sleep," I thought. Quietly I 4 out of bed and picked up pencil and paper from the dresser, then tiptoed into the hall. The 5 from the living room shone dimly. I knew Mother was downstairs mending socks. I quickly 6 a note asking Mother to forgive me for being so 7 . I didn't want my brothers and sisters to know my 8 , so I added a postscript:"Please don't let anyone see this." Then I quietly moved 9 my parents' bedroom and put the letter under Mother's pillow. The next morning, when I 10 my bed after breakfast. I unexpectedly found a 11 note under my pillow. Mother wrote that she loved me and 12 me. This became my 13 of apologizing whenever I talked back or disobeyed. Mother always left a return note, but she never 14 our under-the-pillow messages in front of the family. Even when we were 15 , she never mentioned them when we brothers and sisters recalled our childhood. When mother 16 , I had to go through her personal belongings. In her desk was a bundle of notes tied with a faded ribbon. On top was a message in her handwriting. It read,"In the event of my death, please 17 these." I 18 the packet and glanced at the handwriting on the bottom. To my surprise I 19 my childish writing,"P.S. Please don't let anyone see this. Love, Edie." I gently glanced the unopened bundle in the 20 along with other things for the rubbish burner. "Lord," I prayed"make me like my mother." | ||||
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