6 . Today's world is not an easy adjustment for young adults. Key skill set for success is persistence (毅力), a characteristic that researchers say is heavily influenced by fathers. Researchers from Brigham Young University discovered that fathers are in a unique position to help their adolescent children learn persistence.

BYU professors Laura Padilla-Walker and Randal Day arrived at these findings after following 325 American families over several years. And over time，the persistence gained through fathers led to higher achievement in school.

"There are relatively few studies that stress the unique role of fathers，"Padilla-Walker said. "This research also helps to prove that characteristics such as persistence-which can be taught-are key to a child's life success.”

Researchers determined that dads need to practice an "authoritative" parenting style. Authoritative parenting is not authoritarian:rigid，demanding or controlling. Rather，an authoritative parenting style includes some of the following characteristics:children feel warmth and love from their father；responsibility and the reasons behind rules are stressed children are given an appropriate level of autonomy(自主权).

In the study，about 52 percent of the dads exhibited above-average levels of authoritative parenting. A key finding is that over time，children raised by an authoritative father were significantly more likely to develop persistence，which leads to better outcomes in school.

This particular study examined 11 to 14-year-olds living in two-parent homes. Yet the researchers suggest that single parents still may play a role in teaching the benefits of persistence，which is an avenue of future research.

7 . Let's take a minute to think about the water we use. The human body is 60% water and we need to drink lots of water to be healthy. When we are thirsty we just go to the kitchen and fill a glass with clean water.

    1    For example, farmers, who produce the food we eat, use water to make the plants grow. When we turn on a light or switch on a TV or a computer we use energy and we need water to produce this energy.

The truth is that we are lucky enough to have clean water whenever we want，but this is not the case for many people around the world.    2    That's around one in 10 people in the world. If we drink dirty water，we can catch diseases from the bacteria and become ill. Every year over 500，000 children die from diarrhea(腹泻)from dirty water. That's around 1，400 children every day！Also，in some countries children walk many kilometres every day to get water.    3    Therefore，they don't have time to learn how to read or write and don't get an education.

    4    On this day every year，countries around the world hold events to educate people about the problems of dirty water and that clean water is something that everyone should have around the world. At one school in the UK，children between the ages of 10 and 15 walk 6km with six litres of water.    5    People give them money to do this and all the money helps get clean water to as many people as possible around the world.

8 . Rainforests are home to a rich variety of medicinal plants, food, birds and animals. Can you believe that a single bush（灌木丛）in the Amazon may have more species of ants than the whole of Britain! About 480 varieties of trees may be found in just one hectare of rainforest.

Rainforests are the lungs of the planet-storing vast quantities of carbon dioxide and producing a significant amount of the world's oxygen. Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy（树冠层）of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.

Amazingly, the trees grow in such a way that their leaves and branches, although close together, never actually touch those of another tree. Scientists think this is the plants' way to prevent the spread of any tree diseases and make life more difficult for leaf-eating insects like caterpillars. To survive in the forest, animals must climb, jump or fly across the gaps. The ground floor of the forest is not all tangled leaves and bushes, like in films, but is actually fairly clear. It is where dead leaves turn into food for the trees and other forest life.

They are not called rainforests for nothing! Rainforests can generate 75%of their own rain. At least 80 inches of rain a year is normal-and in some areas there may be as much as 430 inches of rain annually. This is real rain-your umbrella may protect you in a shower, but it won't keep you dry if there is a full rainstorm. In just two hours, streams can rise ten to twenty feet. The humidity（湿气）of large rainforests contributes to the formation of rainclouds that may travel to other countries in need of rain.

9 . “They tell me that you’d like to make a statue(塑像) of me-is that correct, Miss Vinnie Ream?”

The deep, gentle voice helped calm the nervous girl. Asking a favor of the President of the United States was no casual matter, especially for a seventeen-year-old girl.

“Yes, sir,” she replied, her dark eyes meeting his. “I wouldn’t have duo ask you, but my teacher, Mr. Mills, says I am ready. I plan to make it in an admirable manner. “

President Lincoln smiled. “Painters, sculptors-they’ve all tried to make the best of this ordinary face, but I’m afraid there’s not much hope. What did you have in mind, Miss Ream? A bust(半身像)?”

Before Vinnie could say yes, the President hurried on, a shade of apology in his voice.

“Of course-I shouldn’t have asked. A full-length pose would be much too big a project for a young woman your size. “

Vinnie’s face turned red. She realized she looked like a child, with her tiny figure. “Small does not mean weak, sir,” she defended herself. “I was born in the country of Wisconsin. I’ve driven teams of horses and carried water. Making a full-length clay(粘土) figure would not exhaust my strength-and that is what I intend to do!”

The President’s eyes, brightened at her show of spirit. “Sorry, madam, I have underestimated you as I didn’t know your background.”

But his smile faded as he rubbed his beard with bony fingers, in thought. “Miss Ream,” he sighed, “I’d like to let you do it, but as you know, we are in the middle of a war. How could I possibly take the time to pose for a sculpture now? I hardly have a minute to myself.”

Vinnie glanced around and noted the size of his office. “I work quickly,” she said. Her voice was soft but confident as she pointed to the corner near the windows. “If I were to bring my clay here and work for three hours every afternoon, I could complete most of the project while you are at your desk.”

The President seemed to consider her idea seriously. He got up and shook Vinnie’s hand warmly, “I’ve heard that you are a talented young woman, and I have found you charming and intelligent as well. I cannot make my decision immediately, but you will hear from me soon.”

The very next day, Vinnie received an invitation from the President.

During this past year, I’ve had three instances of car trouble. Each time these things happened, I was sick of the way most people hadn’t bothered to help. One of those times, I was on the side of the road for close to three hours with my big Jeep. I put signs in the windows, big signs that said NEED A JACK (千斤顶), and offered money. Nothing. Right as I was about to give up, a Mexican family in a small truck pulled over, and the father bounded out.

He sized up the situation and called for his daughter, who spoke English. He conveyed through her that he had a jack but that it was too small for the Jeep, so we would need something to support it. Then he got a saw (锯子) from the truck and cut a section out of a big log on the side of the road. We rolled it over and put his jack on top, and we were in business.

I started taking the wheel off, and then, if you can believe it, I broke his tire iron. No worries: He handed it to his wife, and she was gone in a flash down the road to buy a new tire iron. She was back in 15 minutes. We finished the job, and I was a very happy man.

The two of us were dirty and sweaty. His wife prepared a pot of water for us to wash our hands. I tried to put a $20 bill in the man’s hand, but he wouldn’t take it, so instead I went up to the truck and gave it to his wife as quietly as I could. I asked the little girl where they lived. Mexico, she said. They were in Oregon so Mommy and Daddy could work on a fruit farm for the next few weeks. Then they would go home.

When I was about to say goodbye, the girl asked if I’d had lunch.

After they left, I got into my Jeep and opened the paper bag.