A Brown University sleep researcher has some advice for people who run high schools: Don’t start classes so early in the morning. It may not be that the students who nod off at their desks are lazy. And it may not be that their parents have failed to enforce(确保) bedtime. Instead, it may be that biologically(生物学上)these sleepyhead(贪睡者)students aren’t used to the early hour.

　　“Maybe these kids are being asked to rise at the wrong time for their bodies,” says Mary Carskadon, a professor looking at problem of adolescent (青春期的)sleep at Brown’s School of Medicine.

　　Carskadon is trying to understand more about the effects of early school time in adolescents. And, at a more basic level, she and her team are trying to learn more about how the biological changes of adolescence affect sleep needs and patterns(方式).

　　Carskadon says her work suggests that adolescents may need more sleep than they did at childhood, no less, as commonly thought.

　　Sleep patterns change during adolescence, as any parent of an adolescent can prove. Most adolescents prefer to stay up later at night and sleep later in the morning. But it’s not just a matter of choice---their bodies are going through a change of sleep patterns.

　　All of this makes the transfer(迁移)from middle school to high school---which may start one hour earlier in the morning----all the more difficult, Carskadon says. With their increased need for sleep and their biological clocks set on the “sleep late, rise late” pattern, adolescents are up against difficulties when they try to be up by 5 or 6 a.m. for a 7:30 a.m. first bell. A short sleep on a desktop may be their body’s way of saying. “I need a timeout.”

1.Carskadon suggests that high schools should not start classes so early in the morning because _______.

A．it is really tough for parents to enforce bedtime

B．it is biologically difficult for students to rise early

C．students work so late at night that they can’t get up early

D．students are so lazy that they don’t like to go to school early

2.The underlined phrase nod off most probably means _______.

A．turn around       B．agree with others   C．fall asleep         D．refuse to work

3.What might be a reason for the hard transfer from middle school to high school?

A．Adolescents depend more on their parents.

B．Adolescents have to choose their sleep patterns.

C．Adolescents sleep better than they did at childhood.

D．Adolescents need more sleep than they used to.

4.What is the test mainly about?

A．Adolescent health care.

B．Problems in adolescent learning.

C．Adolescent sleep difficulties.

D．Changes in adolescent sleep needs and patterns.

 

【小题1】 What is necessary to know when we speak English besides using grammar?

A．Introduction.

B．The culture.

C．Grammar.

D．Topics.

【小题2】 "When speaking to a stranger, ask them where they are from and then make a connection (联系) with that place" can be used as a sentence to_______.

A．speak about location	B．talk about sports
C．address people	D．talk about work

【小题3】 We can learn from the text that_______.

A．Americans shake hands when greeting same sex friends

B．different sex friends should hold hands when first meeting

C．when you speak to others, it's polite to look into their eyes

D．smoking is not allowed in the modem United Sates

【小题4】 What would be the best title for the text?

A．American English Tips.	B．Language Differences.
C．The Different Language Culture.	D．American Customs.

下面列出了几组物质，请将物质的合适组号填写在空格上。⑴同位素       ，⑵同素异形体__________；⑶同系物      ，⑷同分异构体       。
①金刚石与“足球烯”C₆₀；    ②D与T；   ③¹⁶O、¹⁷O和¹⁸O；
④氧气（O₂）与臭氧（O₃）； ⑤CH₄和CH₃CH₂CH₃；
⑥乙醇（CH₃CH₂OH）和甲醚（CH₃OCH₃）；
⑦和；  ⑧               和；

My School Day in London

Tim Hunt is telling 1 Chinese classmates about his school day in London.

My school day in London is different 2 my school day here in China. School starts 3 nine o’clock. I get up at 7:00 4 weekdays. I go to school 5 underground(地铁). It 6 about forty–five minutes. I have 7 at school. Classes are over at 3:15. It is early, 8 I stay at school and play games 9 my friends. I am 10 the basketball team. We practice(联系)on Monday 11 Wednesday. We have a match 12 Friday afternoon.

On Saturday 13 I get up late. Then I 14 my parents tidy(弄整洁)the house and the garden. In the evening I often go to film or a club(俱乐部).On Sunday I have a good rest and of course, I do 15.

1.                A．he            B．him            C．his  D．their

 

2.                A．from           B．in             C．of   D．at

 

3.                A．for            B．at             C．on   D．in

 

4.                A．for            B．of             C．on   D．in

 

5.                A．in             B．on             C．by   D．with

 

6.                A．goes           B．stands          C．wants    D．takes

 

7.                A．breakfast       B．lunch          C．dinner   D．supper

 

8.                A．and            B．but            C．or   D．so

 

9.                A．and            B．but            C．with D．about

 

10.               A．in             B．on            C．at    D．of

 

11.               A．to             B．and            C．at    D．with

 

12.               A．on            B．in             C．at    D．for

 

13.               A．morning        B．afternoon       C．evening   D．night

 

14.               A．want           B．help           C．ask   D．tell

 

15.               A．my homeworks   B．the homeworks  C．my homework  D．mine homewok

 

 

Different things usually stand for different feelings. Red, for example, is the color of fire, heat, blood and life. People say red is an exciting and active color. They associate（使发生联系） red with a strong feeling like   46 . Red is used for signs of   47 , such as STOP signs and fire engines. Orange is the bright, warm color of   48  in autumn. People say orange is a   49  color. They associate orange with happiness. Yellow is the color of __50__. People say it is a cheerful color. They associate yellow too, with happiness. Green is the cool color of grass in __51__. People say it is a refreshing color. In general, people __52__ two groups of colors: warm colors and cool colors. The warm colors are red, orange and __53__. Where there are warm color and a lot of light, people usually want to be __54__. Those who like to be with __55 _ like red. The cool colors are __56_  and blue. Where are these colors, people are usually worried. Some scientists say that time seems to __57 _ more slowly in a room with warm colors. They suggest that a warm color is a good __58_  for a living room or a __59_ . People who are having a rest or are eating do not want time to pass quickly. __60  colors are better for some offices if the people working there want time to pass quickly.

【小题1】

A．sadness B．anger C．administration D．smile

【小题2】

A．roads B．ways C．danger D．places

【小题3】

A．land B．leaves C．grass D．mountains

【小题4】

A．lively B．dark C．noisy D．frightening

【小题5】

A．moonlight B．light C．sunlight D．stars

【小题6】

A．summer B．spring C．autumn D．winter

【小题7】

A．speak B．say C．talk about D．tell

【小题8】

A．green B．yellow C．white D．gray

【小题9】

A．calm B．sleepy C．active D．helpful

【小题10】

A．the other B．another C．other one D．others

【小题11】

A．black B．green C．golden D．yellow

【小题12】

A．go round B．go by C．go off D．go along

【小题13】

A．one B．way C．fact D．matter

【小题14】

A．factory B．classroom C．restaurant D．hospital

【小题15】

A．Different B．Cool C．Warm D．All