Whenitcomestoyourskin,thereisa-优题课

B
Dear Dad ,
Today I was at the shopping mall and I spent a lot of time reading the Father’s Day cards . They all had a special message that in some way or another reflected how I feel about you . Yet as I selected and read , it occurred to me that not a single card said what I really want to say to you.
You’ll soon be 84 years old , Dad , and you and I will have had 55 Father’s Days together . I haven’t always been with you on Father’s Day but I’ve always been with you in my heart.
You know , Dad , there was a time when we were separated by the generation gap . You stood on one side of the Great Divide and I on the other.
The Father-Daughter Duel shifted into high gear（档位）when you taught me to drive the old Dodge and I decided I would drive the 54 Chevy whether you liked it or not . The police officer who sent me home after you reported the Chevy stolen didn’t have much tolerance for a stubborn 16 year old , while you were so tolerant about it , Dad , and I think that was probably what made it the worst night of my life.
Our relationship picked up when I married a man you liked , and things really turned around when we began making babies right and left . Somewhere along the line , the generation gap disappeared . I suppose I saw us and our relationship as aging together , rather like a fine wine.
But the strangest thing happened last week . I was at a stop sign and I watched as you turned the corner in your car . It didn’t immediately occur to me that it was you because the man driving looked so elderly and fragile behind the wheel of that huge car . It was rather like a slap in the face delivered from out of nowhere. Perhaps I saw your age for the first time that day.
I guess what I’m trying to say , Dad , is what every son and daughter wants to say to their Dad today . Honoring a father on Father’s Day is about respect and sharing and acceptance and tolerance and giving and taking . It’s about loving someone more than words can say , and it’s wishing that it never had to end.
I love you , Dad.
Love,
Jenny
What caused Jenny to write the letter ?

A．Getting along well with her father .

B．Being away on previous Father’s Day .

C．Visiting a card exhibition at a mall .

D．Failing to find a satisfactory card .

What does the underlined phrase “ turned around ” in Para. 5 mean ?

A．Because better.	B．Changed unexpectedly .
C．Went worse .	D．Progressed unsteadily .

What can we learn from Para. 6 ?

A．Jenny seldom saw her father drive that huge car .

B．Jenny had never realized her father’s being weak .

C．Jenny’s father slapped her on the face somewhere .

D．Jenny knew her father’s real age from that day on .

Jenny wrote her father this letter to __________ .

A．inform him of their conflicts

B．apologize for her being stubborn

C．express her genuine love to him

D．remind him of the early incident

A
One morning, Ann’s neighbor Tracy found a lost dog wandering around the local elementary school. She asked Ann if she could keep an eye on the dog. Ann said that she could watch it only for the day.
Tracy took photos of the dog and printed off 400 FOUND fliers（传单）, and put them in mailboxes. Meanwhile, Ann went to the dollar store and bought some pet supplies, warning her two sons not to fall in love with the dog. At the time, Ann’s son Thomas was 10 years old, and Jack, who was recovering from a heart operation, was 21 years old.
Four days later Ann was still looking after the dog, whom they had started to call Riley. When she arrived home from work, the dog threw itself against the screen door and barked madly at her. As soon as she opened the door, Riley dashed into the boys’ room where Ann found Jack suffering from a heart attack. Riley ran over to Jack, but as soon as Ann bent over to help him the dog went silent.
“If it hadn’t come to get me, the doctor said Jack would have died,” Ann reported to a local newspaper. At this point, no one had called to claim the dog, so Ann decided to keep it.
The next morning Tracy got a call. A man named Peter recognized his lost dog and called the number on the flier. Tracy started crying, and told him, “That dog saved my friend’s son.”
Peter drove to Ann’s house to pick up his dog, and saw Thomas and Jack crying in the window. After a few moments Peter said, “Maybe Odie was supposed to find you, maybe you should keep it.”
What did Tracy do after finding the dog?

A．She looked for its owner

B．She gave it to Ann as a gift.

C．She sold it to the dollar store.

D．She bought some food for it.

How did the dog help save Jack?

A．By breaking the door for Ann.

B．By leading Ann to Jack’s room.

C．By dragging Jack out of the room.

D．By attending Jack when Ann was out.

What was Ann’s attitude to the dog according to Paragraph 4?

A．Sympathetic	B．Doubtful
C．Tolerant	D．Grateful

For what purpose did Peter call Tracy?

A．To help her friend’s son.

B．To interview Tracy

C．To take back his dog.

D．To return the flier to her.

What can we infer about the dog from the last paragraph?

A．It would be given to Odie.

B．It would be kept by Ann’ family.

C．It would be returned to Peter.

D．It would be taken away by Tracy.

D
Everyone has those nights-you lie in your bed for hours, tossing and turning, totally unable to fall asleep. You wish you could just turn your brain off as if it were a light. That would make things much easier, wouldn’t it?
Now it looks like you are one step closer to this wild dream of yours-scientists from Oxford University, UK have just discovered the “switch” that tells the brain to go to sleep, reported Forbes.
To understand the study, you first need to know that there are two mechanisms(机能) that regulate sleep. There’s one that we’re already familiar with —our body clock, which works in a 24-hour cycle based on the light changes throughout the day.
The other one is what scientists call the sleep “homeostat(动态平衡系统)”. This mechanism has nothing to do with daylight. Instead, it keeps track of the brain’s waking hours and urges it to rest if it has been awake for a long time. “It is similar to the thermostat(自动调温器) in your home. A thermostat measures temperature and switches on the heating if it’s too cold,” Professor Gero Miesenbock, who led the study, told The Telegraph.
Our bodies use both of the mechanisms to regulate sleep. “The body clock says it’s the right time, and the sleep thermostat has built up pressure during a long waking day,” explained Miesenbock.
There is no way that scientists can trick the body clock. But with the sleep homeostat, there might be something they can do.
The researchers found that the sleep homeostat works by activating a specific group of nerve cells, or neurons, in the brain. They tested their theory on fruit flies by removing the neurons from the insects’ brains. And as expected, they found that the flies without the homeostat neurons did not keep a regular sleep pattern anymore.
Now that scientists have pinpointed the exact place in the brain— or, the “switch”—that regulates sleep, they can begin investigating how to activate these cells at any given time so that people can be sent to sleep instantly.
More importantly, figuring out how sleep mechanisms work may also help us to one day unravel one of the oldest mysteries of all: why do we need to sleep in the first place?
What is the article mainly about?

A．A new way to treat sleep disorders.

B．The discovery of the sleep “homeostat”

C．Advice on what to do when you fail to fall asleep.

D．A comparison of the two mechanisms that regulate sleep.

How does the author explain the function of the sleep homeostat?

A．Through examples.

B．With comparisons.

C．Through cause and effect analysis.

D．By presenting research findings.

What can we conclude from the article?

A．Generally, the sleep homeostat has less effect on people during the day than at night.

B．There is little scientists can do to affect the way the sleep homeostat works.

C．What makes us go to sleep at night is probably a combination of the two mechanisms.

D．The more homeostat neurons there are in one’s brain, the more easily one can fall asleep.

The underlined word “unravel” in the last paragraph is closest in meaning to .

A．put up with	B．figure out
C．keep track of	D．take notice of

C
However wealthy we may be, we can never find enough hours in the day to do everything we want. Economics deals with this problem through the concept of opportunity cost, which simply refers to whether someone’s time or money could be better spent on something else.
Every hour of our time has a value. For every hour we work at one job we could quite easily be doing another, or be sleeping or watching a film. Each of these options has a different opportunity cost—namely, what they cost us in missed opportunities.
Say you intend to watch a football match but the tickets are expensive and it will take you a couple of hours to get to and from the stadium. Why not, you might reason, watch the game from home and use the leftover money and time to have dinner with friends? This—the alternative use of your cash and time—is the opportunity cost.
For economists, every decision is made by knowledge of what one must forgo—in terms of money and enjoyment—in order to take it up. By knowing precisely what you are receiving and what you are missing out on, you ought to be able to make better-informed, more reasonable decisions. Consider that most famous economic rule of all: there’s no such thing as a free lunch. Even if someone offers to take you out to lunch for free, the time you will spend in the restaurant still costs you something in terms of forgone opportunities.
Some people find the idea of opportunity cost extremely discouraging: imagine spending your entire life calculating whether your time would be better spent elsewhere doing something more profitable or enjoyable. Yet, in a sense it’s human nature to do precisely that—we assess the advantages and disadvantages of decisions all the time.
In the business world, a popular phrase is “value for money.” People want their cash to go as far as possible. However, another is fast obtaining an advantage: “value for time.” The biggest restriction on our resources is the number of hours we can devote to something, so we look to maximize the return we get on our investment of time. By reading this passage you are giving over a bit of your time which could be spent doing other activities, such as sleeping and eating. In return, however, this passage will help you to think like an economist, closely considering the opportunity cost of each of your decisions.
According to the passage, the concept of “opportunity cost” is applied to ________.

A．making more money

B．taking more opportunities

C．reducing missed opportunities

D．weighing the choice of opportunities

The “leftover ... time” in Paragraph 3 probably refers to the time ________.

A．spared for watching the match at home

B．taken to have dinner with friends

C．spent on the way to and from the match

D．saved from not going to watch the match

What are forgone opportunities?

A．Opportunities you forget in decision-making.

B．Opportunities you give up for better ones.

C．Opportunities you miss accidentally.

D．Opportunities you make up for.

B
One morning, Ann’s neighbor Tracy found a lost dog wandering around the local elementary school. She asked Ann if she could keep an eye on the dog. Ann said that she could watch it only for the day.
Tracy took photos of the dog and printed off 400 FOUND fliers（传单）, and put them in mailboxes. Meanwhile, Ann went to the dollar store and bought some pet supplies, warning her two sons not to fall in love with the dog. At the time, Ann’s son Thomas was 10 years old, and Jack, who was recovering from a heart operation, was 21 years old.
Four days later Ann was still looking after the dog, whom they had started to call Riley. When she arrived home from work, the dog threw itself against the screen door and barked madly at her. As soon as she opened the door, Riley dashed into the boys’ room where Ann found Jack suffering from a heart attack. Riley ran over to Jack, but as soon as Ann bent over to help him the dog went silent.
“If it hadn’t come to get me, the doctor said Jack would have died,” Ann reported to a local newspaper. At this point, no one had called to claim the dog, so Ann decided to keep it.
The next morning Tracy got a call. A man named Peter recognized his lost dog and called the number on the flier. Tracy started crying, and told him, “That dog saved my friend’s son.”
Peter drove to Ann’s house to pick up his dog, and saw Thomas and Jack crying in the window. After a few moments Peter said, “Maybe Odie was supposed to find you, maybe you should keep it.”
What did Tracy do after finding the dog?