Dogs might have the latest tools in the fight against cancer （癌症）：their noses!Researchers at California's Pine Street Foundation （PSF） say they have trained five dogs to smell cancer on a prison's breath.This could be exciting news.
A dog's sense of smell may be 10，000 to 100，000 times stronger than ours.But can dogs really smell illness？PSF researcher Michael McCulloch says yes. "We were very surprised by how exact they were，" he said. "They were telling who had cancer，and they were also saying who didn't."
McCulloch and his team asked four healthy people and one with cancer to blow into plastic tubes （塑料管）.Special materials in the tubes kept the things of each breath.The tubes were then placed one yard apart.Finally the dogs were allowed to smell the tubes.Each dog had been trained for three weeks to sit when it smelled cancer.Ninety﹣nine percent of the time，the dog sat next to the tubes blown into by patients with lung cancer.The dogs were right 88 percent of the time about breast cancer.
Dogs in the Pine Street Foundation test were trained to sit when they smelled cancer.How well did they perform？Take a look at this chart to find out. |
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Breath Sample |
Number of Times the Dogs Sat Down |
Number of Times the Dogs Kept Standing |
Breath from lung cancer patients |
564 |
10 |
Breath from healthy persons |
4 |
720 |
No lab test for cancer has given more correct results than this test.The results are so amazing that many experts question the dogs' smelling power.They wonder if there were other reasons why the dogs did so well.For example，they thought the way the dog trainers behaved could have influenced how the dogs acted.However，most experts agree that this study is important.The information could help scientists create a simple breath test for cancer in the future.Once again humans may be getting a helping paw or nose﹣from their best animal friends.
（1）What's the latest tool a dog might have in the fight against cancer？
A.Tooth.
B.Nose.
C.Ear.
（2）What happened first in the Pine Street Foundation test？
A.The dogs were trained.
B.The tubes were placed one yard apart.
C.The dogs smelled the tubes.
（3）What was a dog supposed to do when it smelled cancer？
A.Smell again.
B.Turn around.
C.Sit down.
（4）Look at the chart.How many times did the dogs keep standing when they smelled the breath from healthy persons？
A.Less than 10 times.
B.Almost 600 times.
C.About 700 times.
（5）Why do many experts question the dog's smelling power？
A.Because no lab test for cancer has given more correct results.
B.Because the dog trainers influenced how the dogs acted.
C.Because they don't think this study is important.
| Susan, the US My best friend is Fanny. She is clever and interesting. We always look after each other. The first week we met, I got sick and she looked after me every day. |
| Betty, England My best friend is Ana. She is honest and serious. We were born in the same city in England. Then I moved to America with my family. I thought I would never see Ana again. When I went to college in New Your, Ana and I shared the same room! |
| Ken, Japan I love to spend time with Daisuke because he is funny and smart. We enjoy talking about the funny things we did when we were children, and tell the same stupid jokes over and over again. |
| Lily, Australia Linda is a very confident girl and she is really kind. Some people may wonder why Linda and I are best friends because we totally different, but I think this is why we are such good friends. |
Who is Susan’s best friend?
| A．Ana. | B．Fanny. | C．Linda. | D．Daisuke. |
Where is Ken from?
| A．Australia. | B．The US. | C．England. | D．Japan. |
What is Linda like?
A. Confident and kind. B. Funny and smart.
Shopping on the Internet is becoming more and more popular. Why do people use the Internet to shop? Some people say it is more convenient. They don’t have to leave their homes to order something; they can shop for anything they want at any time; they can find things for sale that they can’t find in the stores near their homes. Still other people say they can find better prices on the Internet.
If you want to buy something on the Internet, you need a credit(信用) card. You have to type your credit card number and information on the website(网页) and send them to the store over the Internet. You have to be sure that the store will not use your information in the wrong way. You don’t want someone to get your credit card number, so be careful with it, beause people sometimes steal(窃取) credit card numbers from stores.
The Internet is also a good place to go window-shopping. Window-shopping is when you look at the things for sale in a store, but don’t plan to buy anything. In window-shopping you can see what kinds of things you are able to get and how much they cost. Some stores like Ross Stores have a website for information about their stores, but not for shopping. Some stores have a website for information about their stores, and can shop on-line there, such as Office Depot, Payless Shoe Source, Safeway. Some stores like Amazon. com are only for on-line shopping. Some people use the Internet to shop because ________.
| A．they can sleep all day long | B．they want to leave their homes |
| C．they want to play with their friends | D．they can get things with less money |
The Chinese meaning of the word “convenient” in this passage is “________”.
| A．时髦的 | B．较近的 | C．方便的 | D．可用的 |
If you want to shop on the Internet, you need ________.
| A．an ID card | B．a credit card | C．an IC card | D．a room card |
Which of the following is NOT true according to the passage?
| A．You can shop on-line at www.officedepot.com |
| B．You cannot shop on-line at www.rossstores.com |
| C．You can only do window-shopping at www.amazon.com |
| D．You can do window-shopping and shop on-line at www.safeway.com |
Bill was a boy of 15. His parents went to gambling(赌博) day and night. Nobody cared about hi. He always failed in his exams. So his teachers didn’t like him, nor did his classmates play with him.
Bill often slept in class because his heart was not in school. He almost gave himself up.
One day, Miss Jones, a new teacher, came to Bill’s class. She was a smiling, beautiful woman. Bill was in love! For the first time in his young life, he couldn’t take his eyes off his teachers; yet, still he failed.
It was Miss Jones’ class. She was asking a question. “I’d like the smartest boy to answer my question.” Then she said loudly, “Bill, please!”
Bill was surprised. And he stood up without a word.
“Just try it! I believe you can!”
After school, Miss Jones had a long talk with Bill. She told him that she cared about him and believed in him.
Bill thought a lot that evening. From then on he arrived at school on time every day. Miss Jones helped him with his homework in the afternoon. She even cooked delicious food for him. She told Bill, “Nothing is impossible if you put your heart in it.”
Later, Miss Jones gave another exam. Bill did it with all his heart. He was very excited to find that he had passed the exam. Now Bill discovered that not only could he learn, but he could do it well. A changed took place in Bill’s heart.
You see, one teacher saved one boy, it’s simple(简单的), really. Bill always failed in the exams at first because he ________.
| A．went gambling | B．talked in class | C．didn’t answer | D．gave himself up |
Miss Jones changed Bill by ________.
| A．doing homework for him | B．encouraging and helping him |
| C．giving Bill another exam | D．cooking delicious food for him |
From the passage we can learn ________.
| A．Miss Jones was a loving and careful teacher |
| B．Bill’s parents cared about him very much |
| C．Miss Jones loved to answer Bill’s question |
| D．Bill didn’t like to play with his classmates |
Which may be the best title for the passage?
| A．Parents’ Day | B．A Lazy Boy | C．A Boy’s Change | D．A Strict Teacher |
Do you know that animals have love for each other and their children just like us humans? Let me tell you some moving stories of great animal parents.
Several years ago a heavy rain hit a town and made the river go up. When the rain stopped, people found that a dog swam to an island in the river twice a day for two weeks. Why did she do so? Her four children were there. The mother swam there every day to feed her babies. This true story moved many people.
Another story is about chimpanzees(猩猩). A scientist named Jane Goodall spent 4 years living with chimpanzees in Africa. She found that chimpanzees also cared for those that were hurt or got lost. “It is not only humans who have duties, animals also do,” she said.
Two birds in Chengdu also showed their parental(父母的) love. Their baby was hurt and fell on the street in the center of the city. Cars were driving past but the brave parents rushed down to the road and took the little bird away with their claws(爪子).B
A
D
C
After the heavy rain, the mother dog swam to the island ________.
| A．to look for food | B．to feed her babies |
| C．to move some people | D．to carry things to her owner |
The scientist found chimpanzees ________.
| A．cared for the hurt or lost ones | B．often left for a far place |
| C．always stayed in the same place | D．didn’t care about each other |
The two birds rushed down and took the little one away because ________.
| A．they didn’t like their baby | B．they were not kind enough |
| C．they wanted to teach their baby | D．they wanted to save their baby |
From the passage we know ________.
| A．dogs like to swim across the river in a heavy rain. |
| B．mother birds don’t want to save their children |
| C．animal parents love their children a lot |
| D．all animals want to move people very much |
How do you remember the way to your house? Where do dreams come from? It is your brain(大脑) that does these things. A British scientist showed that “sleep can improve one’s memory.” It’s not a dream for students to study when they sleep. In fact, your brains is working day and night. If you learn words before bed, a certain part of the brain may help you to remember the words while you sleep. What’s more, another scientist in the USA found that there was a “talent button(天才按钮)” in the human brain. It might make a person more talented.
There are more interesting things about the brain. Your brain uses less energy than a fridge light. Just two bananas can give the brain enough energy to work for a whole day. According to some scientists, yawning(打哈欠) keeps our brains “cool”, which makes us think quicker.
Here are some pieces of advice to keep a good brain:
Eat healthy food.
Get a lot of playtime or exercise.
Don’t drink or smoke.
Use your brain a lot. A British scientist found out that ________ could improve our memories.
| A．drink | B．dreams | C．sleep | D．bananas |
According to the passage, if we want to have a good brain, we should ________.
| A．use our brains more | B．sleep fewer hours |
| C．work longer hours | D．remember fewer things |
Which of the following is TRUE according to the passage?
| A．Our brains only work in the daytime. |
| B．Our brains need much energy every day. |
| C．Smoking can keep our brains healthy. |
| D．Getting exercise is good for our brains. |