Surveys of American teenagers find that about half of them do not get enough sleep on school nights. They get an average of 60 to 90 minutes less than experts say they need. Experts say teens are biologically programmed to go to sleep later and wake up later than other age groups. Yet many schools start classes as early as seven in the morning. As a result,many students go to class feeling like Danny,16 years old. He plays two sports,lacrosse and football. He is an active teen--except in the morning. DANNY:"Getting up in the morning is pretty terrible. I'm just very out of it and tired. And through first and second period I can hardly stay awake." Michael Breus,a clinical psychologist with a specialty in sleep disorders says:"These aren't a bunch of lazy kids--although,you know,teenagers can of course be lazy. These are children whose biological rhythms,more times than not,are off."Teens,he says,need to sleep eight to nine hours or even nine to ten hours a night. He says sleepy teens can experience a form of depression that could have big effects on their general well-being. It can affect not just their ability in the classroom but also on the sports field and on the road because any tired driver is dangerous,especially a teenager with a lack of experience. So what can schools do about sleepy students?The psychologist says one thing they can do is start classes later in the morning. Eric Peterson,head of St.George's School in the northeastern state of Rhode Island,says,"In the end,schools ought to do what's the right thing for their students,first and foremost."And he wanted to see if a 30-minute delay would make a difference. did. According to the passage,which of the following is the chief cause of sleepy teenagers? A) Persona haibits. B) Early school hours. C) Sports activities. D) Too much home work.
B
With fifteen years Britain and other nations should be well on with the building of huge industrial complexes for the recycling of waste. The word "rubbish" could lose its meaning because everything which goes into the dumps would be made into something useful. Even the most dangerous and unpleasant wastes would provide energy if nothing else. The latest project is to take a city of around half a million inhabitants and discover exactly what raw materials go into it and what go out. The aim is to find out how much of these raw materials could be provided if a plant for recycling waste were built just outside the city. This plant would recycle not only metal such as steel, lead and copper, but also paper and rubber as well. Another new project is being set up to discover the best ways of sorting and separating the rubbish. When this project is complete, the rubbish will be processed like this: First, it will pass through sharp metal bars which will tear open the plastic bags in which rubbish is usually packed; then it will pass through a powerful fan to separate the lightest elements from the heavy solids; after that rollers will break up everything that can be broken. Finally, the rubbish will pass under magnets , which will remove the bits of iron and steel; the rubber and plastic will then be sorted out in the final stage. The first full-scale giant recycling plants are perhaps fifteen years away. Indeed, with the growing cost of transporting rubbish to more distant dumps, some big cities will be forced to build their own recycling plants before long. What's the main reason for big cities to build their own recycling plants? A) To get big profits from those plants. B) To find out how much of the raw materials could be provided C) To get raw materials locally. D) To deal with wastes in a better way.
D
Q: A little boy went to a farmer who had some puppies to sell and said, "I want to buy one of your puppies." Then reaching deep into his pocket, he pulled out a handful of change and held it up to the farmer. "I've got thirty-nine cents. Is that enough to take a look." "Sure," said the farmer. Then he called his dog, "Here, Dolly!" Out from the doghouse and down the ramp ran Dolly followed by four little balls of fur. The little boy pressed his face against the chain link fence. His eyes danced with delight. As the dogs made their way to the fence, the little boy noticed something else moving inside the doghouse. Slowly, another little ball appeared. This one was much smaller than the others. Down the ramp it slid . Then in a somewhat awkward manner the little pup began hobbling toward the others, doing its best to catch up... "I want that one," the little boy said, pointing to the slow dog. The farmer knelt down at the boy's side and said, "Son, you don't want that puppy. He will never be able to run and play with you like these other dogs will." With that the little boy stepped back from the fence, reached down, and began rolling up one leg of trousers. There was a steel brace running down both sides of his leg. It was joined to a specially made shoe. Looking back up at the farmer, he said, "You see, sir, I don't run very well myself, and he will need someone who understands." The world is full of people who need someone who understands. It can be inferred that "Dolly" in the passage was _ . A) a mother dog B) the little boy's name C) the farmer's son D) one of the puppies
A: A
Q: One day I walked down to get to my car, thinking about what I had to accomplish and scolding myself for being late for work, but surprisingly the car was nowhere to be found. This was at 8 a.m. in the morning. I made trips to all the towing places and police stations, all the time thinking that it was towed by cops .By around 10 a.m., the cops decided that it was actually stolen. After filing a report with them, I finally got to work thinking how my day was completely messed up. Later in the day I went to pick up a rental car at Enterprise only to realize that my license was missing, too, along with my car. I told the enterprise guy the whole story and he offered to take me to the closest DMV and get a duplicate license. 1 was totally shocked. I did not know why this complete stranger would want to take some time off his day to help me. He actually took me to DMV, got a duplicate and then rented me a car. I was upset the whole day because of the events happening to me but somehow this simple act of kindness from a complete stranger made it all worth it. It cheered me up and made me forget all the troubles of the day. I was so moved by this kind act that the next day I made sure someone else got a similar surprise. I took some smiley shaped chocolates and left them on some of my colleagues' desks. There is still a lot of goodness out there in the world. We just need to take the time to notice it. I hope that this story would inspire many others like me to do more acts of kindness. The author writes about his experience _ . A) to criticize the person stealing his cars B) to praise the rental place at Enterprise C) to tell us a surprising but moving story D) to encourage people to do acts of kindness
A: D