A study finds that not enough morning light causes teenagers not to get enough sleep at night. “As teenagers spend more time indoors, they miss necessary morning light. Day light is needed to keep the balance of the body’s 24-hour biological system (生物系统), which regulates (调节) body temperature and sleep styles,” reports Dr. Mariana Figueiro. “These teenagers who receive little morning light are going to bed later, getting less sleep and doing badly in tests. They are more likely to fail in their exams.”
In the study, Dr. Figueiro asked 11 students in Grade 8 to wear special glasses to prevent blue morning light from reaching their eyes. At the end of the 5-day study she found that they fell asleep 30 minutes later than usual.
Throughout her research, Dr. Figueiro has been very worried about teenagers going to bed too late. The problem is that today’s schools require teenagers to be in school very early in the morning. These students are likely to miss the morning light because they often go to school before the sun is up or as it’s just rising.
Furthermore (此外), the schools are not likely to provide enough electric light to keep the balance of this biological system. Our biological system is much more sensitive (敏感的) to blue light. Therefore, having lots of light in the classroom does not make sure that there is enough light to keep our biological system balanced.
【小题1】Which of the following is the result of the study?

Early one morning, Sam started his big green and yellow bus. At the first bus stop many people got on the bus. When he drove on he began talking. “It is now seven. The sky is blue. It will not rain today. We all like sunshine, don't we?”

At one stop a very old man got on. “This boy will give you his seat,” Sam said to the old man. But the boy in the front seat did not move. Then Sam said loudly, “This boy will be good to give you his seat!” The boy's face turned rd． He got up at once.

“Most people want to be kind,” Sam told the old man. “They want to do the right thing. But sometimes they need a push. So I just give them one.” Sam always sang his own song: “I love you, Mr. Sunshine, I love you, Mr. Sun. In all the world I love best. You are the only one.”

1． The story tells us Sam ________. (　)

A．has nothing to worry about

B．likes to talk with people

C．is always ready to help people

D．sometimes helps old people

2． People in his bus seem to be happy because ________. (　)

A．His bus is always early and they can talk in the bus

B．Sam always gives them a push when they got onto the bus

C．Sam can tell them somthing about the weather

D．Sam loves his work and he is very kind to people

3． When the boy heard Sam's words he felt ________. (　)

A．ashamed(惭愧)

B．angry

C．surprised

D．happy

4． In the sentence “They need a little push”, “they”refers to(指的是) ________. (　)

A．old people

B．children

C．weak people

D．most people

5． Sam's song shows his love for ________. (　)

A．his country

B．the people

C．the weather

D．his bus

  It was a beautiful day．There Was no cloud，and the weather Was warm．Trees just turned green，flowers came out．Young people were walking after breakfast，children were playing on the grass happily．（4）Mr. Brown saw an old man standing alone under the tree with a big umbrella（伞）in his hand．

    Mr. Brown went up and asked him，“Do you think we are going to have rain today?”  “No，” said the old man．”I don’t think so．” “Then are you carrying the umbrella because the sun is too hot?” ” No，the sun is not very hot in this season．”

    Mr. Brown looked at the big umbrella again，just then the old man said，“I'm old and my legs aren’t very strong for walking far away．I must have a walking—stick．（5）But young people will think I'm too old to do anything．When I carry an umbrella in such fun weather，they will laugh at me and say I’m stupid（愚蠢），but I don’t mind．"Mr.  Brown said。“Oh，I see．You’re never too old．It's important for US young people to understand me old people．Now let’s have a walk together，will you?” The old man said， “Thank you。let’s go!”

任务1：根据短文内容回答下列各题。

1．When did the story happen?                                                                         

2．From the story we know some old people                                                      

3．After you read the story, you can know                                                         

任务2：将文中划线的甸子翻译成汉语。

4．                                                                       

5．