Texting is a great way to communicate and teenagers are doing just that. New research shows that on average, teens are sending 2,000 text messages a month, and doctors say it’s causing injuries.

13-year-old Bailey Baker keeps using her thumbs, sending text messages to her friends again and again. The past March may have been her best month ever, texting 8,000 times. Now, she says she’s feeling the pain. “Just mainly back and neck problems and thumb numbness,” she says.

Baylor-Garland Dr. Jane Sadler is seeing more and more teens who simply text until it hurts. She says parents, including Bailey’s mom, have no idea how much their kids are texting. “I was thinking she was texting about 25 texts a day,” says Lisa Baker. “Wrong! We’ve uncovered a problem.” It didn’t take Dr. Sadler long to find the problem. She gave Bailey the once-over and learnt that Bailey had developed Texting Teen Tendinitis(肌腱炎)

“A lot of them report pain in their thumbs, back and neck,” says Dr. Sadler. “When we look into it and examine a little bit further, we see texting is the main cause of the problem.” Dr. Sadler says back pain is caused by poor posture while texting. Bailey often texts for up to 2 hours a day; that’s a lot of wear and tear on the thumbs which over time, can break down. Dr. Sadler tells over-texting teens to look into the future. “What I tell them is ‘Hey, you might be normal now, but when you are 40 or 50, you can get arthritis (关节炎).’”

Dr. Sadler recommends limiting texting to 50 a day, and keeping good posture. Dr. Sadler also says touch screens are easier on the thumbs than keyboards and hand exercises are great to build up those muscles, making it easier to text.

1. How many text messages did Bailey Baker send a day on average last month?

A. Less than 226.     B. About 230.            C. About 267.            D. More than 300.

2. Because of texting, Bailey Baker suffers from the following problems EXCEPT ______.

A. back pain               B. neck pain               C. headache              D. thumb numbness

3. What does the underlined part in Paragraph 3 mean?

A. She gave Bailey Baker a quick examination.

B. She solved Bailey Baker’s problem at once.

C. She gave Bailey Baker a piece of advice.

D. She let Bailey Baker send a text message again.

4. What can we conclude from Paragraph 4?

A. Teenagers won’t get hurt if they stop texting right now.

B. Poor posture while texting is the main cause of injuries.

C. Thumbs won’t ache if teens text for no more than 2 hours a day.

D. Over-texting may have a bad effect on people in the long run.

The Los Angeles Zoo has many public programs that aim to teach the public about animals and natural protection.

Safari shuttle(旅游电车)

While you’re here, take the Safari shuttle for a quick trip from one end of the Zoo to the other.

All day long, seven days a week (from 10 am to 5 pm), the Safari Shuttle picks up passengers, circles the Zoo, and returns to the main flamingo (火烈鸟) exhibit near the front entrance. You can get on and off the shuttle as often as you like.

Food

Safari Café (at the Zoo entrance) offers Starbucks coffee, fresh-baked cookies, and ice cream. Gorilla Grill is the spot for toasted food, kids’ meals, snacks, and ice cream. La Casita serves a variety of Mexican food and refreshments（甜点）. Silverback’s Cafe offers sandwiches, salads, bread bowls, cold beer, and refreshments.

Hour

The Zoo is open from 10 am to 5 pm every day of the year except Christmas Day. Special summer long hours are until 6 pm. from July 1 to September 7. Please remember, the Zoo starts putting animals in for the night at 4 pm during regular hours, and at 5 pm. during summer hours.

Admission Prices(票价)

Adults (aged 13 and above): $ 9

  Seniors (aged 62 and above): $ 6

  Children (aged 2 to 12): $ 4

  Children (under 2): free

Items Not Allowed on Zoo Grounds

Alcohol, Glass bottles, Pets, Bicycles, Skateboards, and In-line skate.

  If you are planning a picnic while visiting the Zoo, please do not bring any glass items or other things that are easy to break. Also for the safety of the animals, no plastic bags are allowed within the Zoo.

Which of the following provides kids’ meals?

A. Safari Café.    B. Gorilla Grill.    C. La Casita.      D. Silverback’s Café.

People can see all the animals at the Los Angeles Zoo at ______.

A. 11 am. on Christmas Day           B. 4:30 pm. on May 5

C. 3 pm. on March 5                 D. 6 pm. on September 7

How much does it cost if a couple with their one-year-old twins visit the Los Angeles Zoo?

  A. $18.           B. $26.           C. $22.           D. $17.

When visiting the Los Angeles Zoo, people can______.

  A. ride a bike through the Zoo         B. have a picnic on the Zoo grounds

  C. take food with plastic bags         D. take their pets along

Do you know the cold?
Everybody knows what happens when you catch a cold. First you sniffle(抽鼻涕) or get a more throat. Then you sneeze. After coughing and blowing your way through the next few days it’s over---until next time
Do you know what causes a cold, how it is spread or how to help prevent it? And which of the many medicines is best for your cold?
There is no known cure for the common cold. Once you catch a cold, your body usually produces antibodies(抗体) to the virus which caused the cold. These antibodies help the body develop resistance（抵抗力) to the virus if you catch it again. Unfortunately, over 200 different viruses cause the common cold. These viruses may change over time, so your resistance to them reduces. The large number of viruses and the fact that they change help explain why there is no cure for the common cold and why you will suffer colds in the future.
The colds increase in winter(usually between Septenber and March) but Not because of the cold! Cold weather has not been shown to increase the number of colds. People spend more time indoors in winter. They are therefore more likely to come into physical contact with each other and spread the disease. All these ideas remain to be proven. No one has been able to discover what really causes these colds
Common colds are spread by sneezes or by direct contact with a cold sufferer, usually when two people’ hands touch or an object is passed from one person to another. Sneezing spreads colds when someone sneezes near other people, or sneezes on objects which others later touch. A cold virus can survive up to three hours on hard surfaces.
The simplest and most effective way to lower the risk of catching a cold is to wash your hands frequently. Another important step in cold prevention is for cold sufferers to get rid of used tissues immediately after use.
1.From the passage, we can know____________.
A. a cold virus can survive up to four hours      
B. most of people know how to cure a cold
C. there are more colds in November than in May  
D. all of us catch more than one cold a year
2.According to the passage, people tend to catch a cold___________.
A. because they don’t take exercise in winter    
B.if they stay outdoors in freezinf cold winter
C. if they stay indoors more often in winter  
D.because the viruses of colds usually exist in winter
3.We can know colds sre spread through____________.
A. air and touching     B. coughs and objects   C.two people    D. a person and his hands                            

What is the color of the universe? Astronomers did not answer this question until two months ago. This was when two American astronomers reported on their study of all the light in the universe. They said that the universe would appear to the human eye to be a light greenish color, called turquoise(青绿色). Karl Glazebrook and Ivan Baldry of Johns Hopkins University in Baltimore, Maryland, reported their findings in January. They presented research at a meeting of the American Astronomical Society. They said that finding the color of the universe was not part of their more serious scientific research. They did it for fun.
However, earlier this month, the scientists admitted to making a mistake. They said their finding was much more colorful than it should have been. They now say the light from our universe is closer to white. It is more like a milky or creamy white color.
The scientists gave a number to each of the colors of the different star systems. Then they added the numbers together and found the average measurement. The scientists used this average to identify the color of the universe. They said it was a very pretty light green or turquoise color. They called it “cosmic (宇宙的) spectrum (光谱) green.” Many newspapers and television stations reported their finding.
Other scientists and color engineers attempted to reproduce the result. Mark Fairchild of the Rochester Institute of Technology in New York was the first person to identify a mistake. He discovered a mistake in the computer software program used by the Johns Hopkins scientists.
When the mistake was corrected, the results changed. The new color of the universe is much less colorful. It is very close to white. The scientists apologized for the mistake. They are now working with the Rochester Institute of Technology to produce more images regarding the color of the universe.
48. Why did the scientists do the research?
A. They wanted to win a Nobel Prize.     B. It’s required by the government.
C. They did it just for fun.              D. It’s part of their research.
49. We can infer that the passage was probably written in _______.
A. January     B. February    C. May        D. March[来源:学*科*网]
50. According to the passage, which of the following statements is TRUE?
A. None of the researches done by scientists is right.
B. Scientists sometimes may make mistakes in their work.
C. The color of the universe is light greenish.
D. Mark Fairchild apologized for his mistake about the color of universe.

The Los Angeles Zoo has many public programs that aim to teach the public about animals and natural protection.

Safari shuttle(旅游电车)

While you’re here, take the Safari shuttle for a quick trip from one end of the Zoo to the other. All day long, seven days a week (from 10 am to 5 pm), the Safari Shuttle picks up passengers, circles the Zoo, and returns to the main flamingo (火烈鸟) exhibit near the front entrance. You can get on and off the shuttle as often as you like.

Food

Safari Café (at the Zoo entrance) offers Starbucks coffee, fresh-baked cookies, and ice cream. Gorilla Grill is the spot for grilled (烤的) food, kids’ meals, refreshments (点心), and ice cream. La Casita serves a variety of Mexican food and refreshments. Silverback's Cafe offers sandwiches, salads, bread bowls, cold beer, and refreshments.

Hour

The Zoo is open from 10 am to 5 pm every day of the year except Christmas Day. Special summer long hours are until 6 pm from July 1 to September 7. Please remember, the Zoo starts putting animals in for the night at 4 pm during regular hour, and at 5 pm during summer hours.

Admission Prices(票价)

Adults (aged 13 and above):$9

  Seniors(aged 62 and above):$6

  Children(aged 2 to 12):$4

  Children(under 2):free

Items Not Allowed on Zoo Grounds

Alcohol, Glass bottles, Pets, Bicycles, Skateboards, and In--line skate.

  If you are planning a picnic while visiting the Zoo, please do not bring any glass items or other things that are easy to break. Also for the safety of the animals, no plastic bags are allowed within the Zoo.

1.Which of the following provides kids' meals?

A. Safari Cafe.    B. Gorilla Grill.    C. La Casita.    D. Silverback's Café

2.People can see all the animals at the Los Angeles Zoo at ___.

A. 11 am on Christmas Day          B. 4:30 pm on May 5

C. 3 pm on March 5                 D. 6 pm on September 7

3.How much does it cost if a couple with their one-year-old twins visit the Los Angeles Zoo?

    A. $18           B. $26             C. $22          D.$17

4.When visiting the Los Angeles Zoo, people can___.

    A. ride a bike through the Zoo         B. have a picnic on the Zoo grounds

    C. take food with plastic bags        D. take their pets along