解析下面的句子
17. Trains are fast and convenient , but rush hours can be terrible.
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18. Tricycles are worth using if you want to explore the narrow alleys of old Beijing .
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Conventional wisdom says that hardship can make us old before our time. In fact, a new study suggests that violence not only leaves long-term scars on children’s bodies, but also changes their DNA, causing changes that are equal to seven to ten years of premature aging (过早老化).
Scientists measured this by studying the ends of children’s chromosomes (染色体), called telomeres, says Idan Shalev, lead author of a study published in Molecular Psychiatry.
Telomeres are special DNA sequences (序列) which prevent the DNA in chromosomes from separating. They get shorter each time a cell divides, until a cell cannot divide any more and dies.
Several factors have been found to shorten telomeres, including smoking, radiation and psychological stresses such as being treated badly when young and taking care of a chronically ill person.
In this study, researchers examined whether exposure to violence could make children’s telomeres shorten faster than normal. They interviewed the mothers of 236 children at ages 5, 7 and 10, asking whether the youngsters had been exposed to domestic violence between the mother and her partner, physical maltreatment by an adult or bullying. Researchers measured the children’s telomeres—in cells obtained from the insides of their cheeks—at ages 5 and 10.
Telomeres shortened faster in kids exposed to two or more types of violence, says Shalev. Unless that pattern changes, the study suggests, these kids could be expected to develop diseases of aging, such as heart attacks or memory loss, seven to 10 years earlier than their peers.
Shalev says there is hope for these kids. His study found that, in rare cases, telomeres can lengthen. Better nutrition, exercise and stress reduction are three things that may be able to lengthen telomeres, he says.
The study confirms a smallbutgrowing number of studies suggesting that early childhood hardship imprints itself in our chromosomes, says Charles Nelson, a professor of pediatrics and neuroscience at Harvard Medical School.The new study has found that ________.
| A．violence leaves scars on a child’s mind |
| B．violence can speed up a child’s aging |
| C．hardship can change a child’s aging |
| D．hardship has a long-term effect on children |
According to the text, telomeres ________.
| A．probably cause a cell to divide quickly |
| B．can help prevent DNA from separating |
| C．can make a cell die quickly |
| D．become shorter before they die |
All of the following things can shorten telomeres EXCEPT ________.
| A．maltreatment | B．radiation |
| C．smoking | D．exercising |
Which of the following is TRUE, according to the text?
| A．Researchers measured the children’s telomeres from their legs in the study. |
| B．Kids interviewed in the study are exposed to two or more types of violence. |
| C．Children who have shorter telomeres may suffer from a heart attack earlier. |
| D．Victims of domestic violence have no hopes of lengthening their telomeres. |
What is the best title for the text?
| A．Violence aging children’s DNA |
| B．Children’s changing DNA patterns |
| C．Violence and children |
| D．The function of telomeres |
At the age of 16, Clara Barton was advised to become a teacher since she was quite shy. She taught in Massachusetts for ten years, and was invited to Bordentown, New Jersey to teach in a school. She saw that these communities needed complimentary education for their citizens, and she took action by creating a free school, one of the first in her state. But later, ignoring her, officials named a male instead as the head teacher. Disappointed, she left her job and moved to Washington D.C., becoming the first woman employed by the US Patent Office.
Clara Barton was forever changed by her experience with the army in the Civil War. She saw doctors use leaves when dealing with injuries since they had nothing else. The medical supplies were well behind the army, who were moving faster than their medical supply lines. She brought in a truck of medical supplies that she collected personally some years ago. Miss Barton continued to work on the battlefields throughout the war.
She helped in the identification of 13,000 dead Union soldiers. This non-stop work made her fully exhausted, and upon recommendation by her physicians, she traveled to Europe where she recovered energy and enriched herself.
While in Europe, and still in poor health, Miss Barton was moved by the hardship on people brought about by the France-Prussia war. She helped in their relief effort, which encouraged her to create the Red Cross, which served the whole army and common people under a neutral flag.
Clara Barton returned to America and then began the establishment of the American Red Cross. The US government did not think there would ever be another war after the Civil War. But she convinced them that the Red Cross would be valuable to serve in times of natural disasters as well. This was her lasting legacy (遗产), an agency that still provides aid to all people today.What does the underlined word mean in the first paragraph?
| A．Public. | B．Personal. | C．Free. | D．Advanced. |
. Why did Clara Barton bring her personal medical supplies
A There were no medical supplies for the army at all.
B. The army’s supplies couldn’t catch up with them.
C. The army’s supplies weren’t good enough to treat soldiers.
D. The enemies cut off the connection between the army and medical supplies.Clara Barton set up the Red Cross because of _______.
| A．her experiences in Europe |
| B．her poor health |
| C．the lack of supplies for the army |
| D．her work in the US Patent Office |
The US government agreed to establish the Red Cross because Clara Barton _______.
| A．gave a lot of her legacy |
| B．said there might be wars in the future |
| C．explained it would help people in peacetime as well. |
| D．claimed it could save people from the France-Prussia war. |
What does this passage mainly talk about?
| A．The history of American Civil War. |
| B．A general introduction to Clara Barton. |
| C．Clara Barton’s contributions to the US. |
| D．The Establishment of the American Red Cross. |
One evening last summer, when I asked my 14-year-old son, Ray, for help with dinner, his response shocked me. "What’s a colander(漏勺)? " he asked.
I could only blame myself. In the family, nobody else’s hands went in the sauce except my own. But that night, as I explained with a touch of panic that a colander is the thing with holes in it, I wondered what else I hadn’t prepared Ray for.
As parents, while we focus on our sons’ confidence and character, we perhaps don’t always consider that we are also raising someone’s future roommates, boyfriends, husbands, or fathers. I wanted to know that I’d raised a boy who would never ask the woman in his life, "What’s for dinner?" So I came up with a plan: I would offer Ray a private home economics course. I was delighted to find that he didn’t say no. For two hours, three days a week, Ray was all mine. One day, as his tomato sauce reduced on the stove, he washed and seasoned a chicken for roasting. Then he rolled out the piecrust (馅饼皮) and filled it with apples, all while listening to my explanation on the importance of preheating an oven.
I knew that he would rather have been shooting hoops in the driveway than learning to mend socks with his mother—he tried to beg off sewing lessons, even though I insisted that one day, someone would find the sight of him fixing his own shirt very attractive— but it couldn’t be denied that he was learning, and more than just housekeeping. "I appreciate what you do as a mom," he told me one day. Ray now understands the finer points of cooking, and more importantly, he realizes there’s nothing masculine (男子气概的) about being helpless.
Now, not only can he make his own dinner, but also he can make a big meal for his family. That’s what I call a man. I’m glad that I prepared so great a present for my future daughter-in-law.Why was the author shocked at her son’s response?
| A．Because he was not well behaved. |
| B．Because he refused to help with dinner. |
| C．Because he didn’t know the common kitchen utensils (器皿). |
| D．Because he was very curious about kitchen utensils. |
In the author’s opinion, some parents pay little attention to _______.
| A．building up children’s confidence |
| B．telling kids what is right and wrong |
| C．preparing children for their future life |
| D．making children live a hard life |
After learning to do housework, Ray _______.
| A．fell in love with sewing |
| B．did other work in the house |
| C．began to be more hardworking |
| D．acknowledged his mother’s efforts |
We can infer from the text that Ray _______.
| A．made great progress in cooking. |
| B．always thought housework interesting. |
| C．preferred sewing to cooking. |
| D．was unwilling to learn cooking at first. |
What would be the best title for the text?
| A．Useful education for boys |
| B．The importance of housework |
| C．Boys should be involved in housework. |
| D．Cooking and sewing make boys masculine. |
One day a young man was walking along the road when he heard a cry. It seemed to be coming from underneath a bridge. As he approached the bridge, the sound got louder and then he saw pitiful sight. There,
(lie) in the muddy riverbed was a little dog about two months old,
front legs were tightly tied with ropes. It had wounds on its head and
(cover) with mud.
The young man wanted to help the dog, as he approached, the dog started to bark. The young man did not give up.
sat down and started gently talking to the dog. It took a long time but eventually the dog
(stop) barking and the man was able to touch it. The young man carried the dog home, cared
its wounds, and gave it food and water. Even with all of this, the dog was still
(friend) every time the young man approached. But the young man did not give up. Weeks went by and the man continued attending to the dog. Then one day, as the young man approached, the dog wagged its tail.
It was consistent love and kindness won a lifelong friendship of loyalty.
Though giant pandas may appear perfectly happy chewing bamboos, scientists recently discovered that they would rather have something sweeter. Scientists chose because the animals are herbivores (食草动物), which would mean that they would love sweets. However, the plant they choose, the bamboos, has a very sugar content and is therefore not considered sweet. Could this mean that pandas have their hobby for sweet things?
The pandas were given six kinds of sweet liquids that are found in fruits and vegetables. They were also given at the same time. In each of the taste tests, the animals the natural sweeter liquids and ignored the water . They ate up all the sweet liquids and the water was left untouched.
What was even more interesting is that when the scientists the water with five different man-made sweeteners, ones that humans find delicious, the pandas were not as . In these tests, they picked the water instead. The scientists believe that it could be either because pandas found them to be too or not sweet enough and that the mixture could not the pandas.
The scientists were not too by the results, since pandas in zoos have always shown a preference for treats like apples, sweet potatoes and even mooncakes. Scientists believe that the pandas may have once sweeter foods that were available in the lowland areas that they used to live in. But when human settlement in the lowland areas them to the bamboo forests in the mountains, they had no but to settle for the almost sugarless plants.
A．horses B．bears C．monkeys D．pandas
A．high B．simple C．low D．different
A．lost B．followed C．started D．kept
A．specially B．hardly C．naturally D．rarely
A．fruits B．water C．bamboos D．oxygen
A．picked B．hid C．rejected D．shared
A．largely B．gradually C．occasionally D．completely
A．mixed B．covered C．exchanged D．replaced
A．funny B．picky C．perfect D．interested
A．salty B．sweet C．sour D．hot
A．harm B．save C．attract D．change
A．Delighted B．surprised C．disappointed D．concerned
A．Enjoyed B．disliked C．controlled D．ignored
A．Encouraged B．forced C．introduced D．guided
A．desire B．chance C．wonder D．choice
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